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Journal articles on the topic 'Vortex generator (VG)'

Author: Grafiati

Published: 3 June 2025

Last updated: 31 July 2025

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1

Gutierrez-Amo, Ruben, Unai Fernandez-Gamiz, Iñigo Errasti, and Ekaitz Zulueta. "Computational Modelling of Three Different Sub-Boundary Layer Vortex Generators on a Flat Plate." Energies 11, no. 11 (2018): 3107. http://dx.doi.org/10.3390/en11113107.

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Flow separation is the source of several problems in a wind turbine including load fluctuations, lift losses, and vibrations. Vortex generators (VGs) are passive flow control devices used to delay flow separation, but their implementation may produce overload drag at the blade section where they are placed. In the current work, a computational model of different geometries of vortex generators placed on a flat plate has been carried out throughout fully meshed computational simulations using Reynolds Averaged Navier-Stokes (RANS) equations performed at a Reynolds number of R e θ = 2600 based o

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2

Al-Akam, Aws, Hanan K. Kadhim, Sarmad Asi Ali, and Ameen M. Al Juboori. "Numerical Analysis for the Airflow Behaviour around Vortex Generators Used for Air-Cooling Technologies Considering Rotation." CFD Letters 17, no. 9 (2025): 127–44. https://doi.org/10.37934/cfdl.17.9.127144.

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This study investigates the airflow behaviour around vortex generators (VG) utilized in air-cooling technologies, considering the impact of rotation. The analysis encompasses a numerical approach to study the flow around vortex generators (conventional and curved delta winglet type) installed inside a duct with a heated wall. The vortex generators' set number effect on the heat transfer behaviour was investigated. Three sets of vortex generators were examined, two-VG set, four-VG set and six-VG set, equally aligned along the duct. The range of Reynolds numbers (Re) from 4000 to 12000, with the

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3

Hansen, M. O. L., and K. Rogowski. "Investigation of a delta wing Vortex Generator." Journal of Physics: Conference Series 2265, no. 3 (2022): 032037. http://dx.doi.org/10.1088/1742-6596/2265/3/032037.

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Abstract The flow and the effect on a DU08-W-210 airfoil using a conventional and a delta wing vortex generator (VG) has been investigated numerically using ANSYS Fluent and STAR CCM+ CFD solvers. The numerical results from the two CFD programs are very consistent. Both VG geometries delay boundary separation at the trailing edge of the airfoil and thus increase the lift and lift to drag ratio. The overall aerodynamic loads on the airfoil are quite similar for the two different VG geometries, but the created vortices give a slightly different distribution of the skin friction in the wake behin

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4

Ibarra-Udaeta, Iosu, Iñigo Errasti, Unai Fernandez-Gamiz, Ekaitz Zulueta, and Javier Sancho. "Computational Characterization of a Rectangular Vortex Generator on a Flat Plate for Different Vane Heights and Angles." Applied Sciences 9, no. 5 (2019): 995. http://dx.doi.org/10.3390/app9050995.

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Vortex generators (VG) are passive flow control devices used for avoiding or delaying the separation of the boundary layer by bringing momentum from the higher layers of the fluid towards the surface. The Vortex generator usually has the same height as the local boundary layer thickness, and these Vortex generators can produce overload drag in some cases. The aim of the present study was to analyze the characteristics and path of the primary vortex produced by a single rectangular vortex generator on a flat plate for the incident angles of β = 10 ∘ , 15 ∘ , 18 ∘ and 20 ∘ . A parametric study o

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5

Chung, Ping-Han, Po-Hsiang Chang, and Szu-I. Yeh. "The Aerodynamic Effect of an Alula-like Vortex Generator on a Revolving Wing." Biomimetics 7, no. 3 (2022): 128. http://dx.doi.org/10.3390/biomimetics7030128.

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An alula is a small structure of feathers that prevents birds from stalling. In this study, the aerodynamic effect of an alula-like vortex generator (alula-VG) on a revolving wing was investigated using the PIV technique in a water tank. The alula-VG was mounted on a rectangular wing model at two spanwise positions. The wing model with a revolving motion was installed at different angles of attack, which included pre-stall and post-stall conditions. The velocity fields around the wing model with/without an alula-VG were measured and analyzed, including the vorticity contour, the circulation of

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6

Hansen, Martin O. L., Antonis Charalampous, Jean-Marc Foucaut, Christophe Cuvier, and Clara M. Velte. "Validation of a Model for Estimating the Strength of a Vortex Created from the Bound Circulation of a Vortex Generator." Energies 12, no. 14 (2019): 2781. http://dx.doi.org/10.3390/en12142781.

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A hypothesis was tested and validated for predicting the vortex strength induced by a vortex generator in wall-bounded flow by combining the knowledge of the Vortex Generator (VG) geometry and the approaching boundary layer velocity distribution. In this paper, the spanwise distribution of bound circulation on a vortex generator was computed by integrating the pressure force along the VG height, calculated using Computational Fluid Dynamics (CFD). It was then assumed that all this bound circulation was shed into a wake to fulfill Helmholtz’s theorem which then curls up into one primary tip vor

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7

Li, Xin-Kai, Wei Liu, Ting-Jun Zhang, Pei-Ming Wang, and Xiao-Dong Wang. "Experimental and Numerical Analysis of the Effect of Vortex Generator Installation Angle on Flow Separation Control." Energies 12, no. 23 (2019): 4583. http://dx.doi.org/10.3390/en12234583.

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In order to explore the effect of the installation angle of vortex generator (VG) on boundary-layer flow control, the vortex characteristics of plate VG and their effect on the aerodynamic characteristics of an airfoil was studied numerically and using wind tunnel experiments. The effects of five VG installation angles (β) of 10°, 15°, 20°, 25°, and 30° on the characteristics of vortices were studied. The results show that the strength of vortices on the leeward side of VG increases with an increased installation angle until, eventually, the vortex core breaks down. During the downstream devel

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8

Syaiful, Imam Syarifudin, Maria F. Soetanto, and Myung-whan Bae. "Numerical simulation of heat transfer augmentation in fin-and-tube heat exchanger with various number of rows of concave rectangular winglet vortex generator." MATEC Web of Conferences 159 (2018): 02012. http://dx.doi.org/10.1051/matecconf/201815902012.

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The passive method by using a vortex generator (VG) is an effective method for the improvement of convective heat transfer. This study is focused on usage of concave rectangular winglet vortex generator (CRW VG) for improving convective heat transfer in a fin-and-tube heat exchanger using numerical simulation. Concave rectangular winglet pairs (CRWP) and rectangular winglet pairs (RWP) VGs were mounted inside the gap between fins (gas side) with variations of the number of VG pairs of rows. Inlet air velocity variations expressed by the Reynolds numbers were ranged from 364 to 689. Augmentatio

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9

Zainondin, Muhammad Amirul Hakimin, Izuan Amin Ishak, Mohd Fuad Yasak, Mohammad Arafat, Nor Atiqah Zolpakar, and Nurshafinaz Mohd Maruai. "Numerical Analysis on the Aerodynamic Characteristics of SUV Car Model Install with Vortex Generator." Journal of Advanced Research in Fluid Mechanics and Thermal Sciences 125, no. 1 (2024): 94–111. https://doi.org/10.37934/arfmts.125.1.94111.

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The investigation of automotive aerodynamics involves analysing several forces operating on a car while driving on the road, such as drag and lift forces. The flow separation at the vehicle's rear end is one of the primary causes of aerodynamic drag for automobile vehicles. It is feasible to improve fuel efficiency by lowering the drag force. The study focuses on the influence of a vortex generator (VG) on the aerodynamics of a sport utility vehicle (SUV) car. The study aims to simulate fluid flow analysis for an SUV car that uses VG and without VG, as well as to assess the impact of a differe

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10

Li, Xin-kai, Wei Liu, Ting-jun Zhang, Pei-ming Wang, and Xiao-dong Wang. "Analysis of the Effect of Vortex Generator Spacing on Boundary Layer Flow Separation Control." Applied Sciences 9, no. 24 (2019): 5495. http://dx.doi.org/10.3390/app9245495.

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During the operation of wind turbines, flow separation appears at the blade roots, which reduces the aerodynamic efficiency of the wind turbine. In order to effectively apply vortex generators (VGs) to blade flow control, the effect of the VG spacing (λ) on flow control is studied via numerical calculations and wind tunnel experiments. First, the large eddy simulation (LES) method was used to calculate the flow separation in the boundary layer of a flat plate under an adverse pressure gradient. The large-scale coherent structure of the boundary layer separation and its evolution process in the

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11

Huang, C. L., L. Chen, and R. Dai. "Effects of vortex generator on the performance of a flush-intake duct in oblique navigation." Journal of Physics: Conference Series 2217, no. 1 (2022): 012058. http://dx.doi.org/10.1088/1742-6596/2217/1/012058.

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Abstract Effects of vortex generator (VG) on the flow field in a flush-intake duct for waterjet propulsion are investigated numerically under various navigation conditions. Flow’s Reynolds-averaged Navier-Stokes equations (RANS) are solved with the SST-Kω turbulence model. Four VG blades are installed at the ship bottom ahead of the intake entrance. The VG blade is rectangular shaped with a height of 0.1D, a length of 0.3D, and an angle of attack of 20°. Results show that under the forward moving condition, VG device effectively restrains the flow separation on the duct ramp side and improves

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12

Zulkefli, Nur Faraihan, Zulhilmy Sahwee, Nurhayati Mohd Nur, Muhamad Nor Ashraf Mohd Fazil, and Muaz Mohd Shukri. "Lift Augmentation between Passive and Active Vortex Generator." Applied Mechanics and Materials 851 (August 2016): 532–37. http://dx.doi.org/10.4028/www.scientific.net/amm.851.532.

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This study was conducted to investigate the performance of passive and active vortex generator on the wing’s flap. The triangular shape of passive vortex generator (VG) was developed and attached on the wing’s flap leading edge while the plasma actuator performed as active vortex generator. The test was carried out experimentally using subsonic wind tunnel with 300 angles extended flap. Three different types of turbulent flow; with Reynolds number 1.5 x105, 2.0 x105, and 2.6x105 were used to study the aerodynamics forces of airfoil with plasma actuator OFF. All Reynolds number used were below

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13

Li, Xinkai, Ke Yang, and Xiaodong Wang. "Experimental and Numerical Analysis of the Effect of Vortex Generator Height on Vortex Characteristics and Airfoil Aerodynamic Performance." Energies 12, no. 5 (2019): 959. http://dx.doi.org/10.3390/en12050959.

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To explore the effect of the height of vortex generators (VGs) on the control effect of boundary-layer flow, the vortex characteristics of a plate and the aerodynamic characteristics of an airfoil for VGs were studied by both wind tunnel experiments and numerical methods. Firstly, the ratio of VG height (H) to boundary layer thickness (δ) was studied on a flat plate boundary layer; the values of H are 0.1δ, 0.2δ, 0.5δ, 1.0δ, 1.5δ, and 2.0δ. Results show that the concentrated vortex intensity and VG height present a logarithmic relationship, and vortex intensity is proportional to the average k

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14

Kaewpradap, Amornrat, and Maneeratanaporn Phoothornsri. "Parametric Study of the Effects of a Vortex Generator on the Combustion Characteristics of Liquid Petroleum Gas and Physical Air–Fuel Flow on a Slot Burner." Energies 17, no. 18 (2024): 4608. http://dx.doi.org/10.3390/en17184608.

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We conducted a numerical study of the effects of a vortex generator (VG) on the combustion characteristics and physical fluid flow of LPG on a porous bluff-body slot burner (PBSB) model, validating the numerical and experimental results of the temperature distribution and mixture flow velocity. The VG position (fuel (F) and air (A) slots), direction (clockwise, CW, and counterclockwise, CCW), aspect ratio (AR), and distance (S) were investigated parametrically in our porous vortex generator slot burner (PVGSB) model. According to our results, the VGSB model with a VG angle of 60°, CW direction

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15

Syaiful, Bambang Yunianto, Carisya Dara Salsabila, Berkah Fajar T.K., and Maria F. Soetanto. "Effect of Attack Angle of Concave and Convex Winglets Vortex Generators on Thermal-Hydraulic Performance of Fin and Tube Heat Exchangers with Field Synergy Principle." International Journal of Heat and Technology 39, no. 3 (2021): 797–809. http://dx.doi.org/10.18280/ijht.390313.

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In fin and tube heat exchangers, the gas passing through the fin has a lower thermal conductivity than the fluid passing through the tube. The low thermal conductivity brings a high thermal resistance, which suppresses the heat transfer rate. A common practice to enhance fin-side heat transfer is to generate longitudinal vortex by mounting vortex generators (VGs) on the fin. This paper aims to investigate how longitudinal vortex generator (LVG) improves heat transfer and pressure drop. Numerical simulations were carried out to analyze three types of VGs. The installation of VGs was varied with

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16

Rahuna, Daif, Erwandi, Dendy Satrio, and I. Ketut Aria Pria Utama. "Opportunities for Utilizing Vortex Generators on Vertical Axis Ocean Current Turbines: A Review." BIO Web of Conferences 89 (2024): 10003. http://dx.doi.org/10.1051/bioconf/20248910003.

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Researchers have studied vertical axis turbines (VATs) for their low power efficiency, focusing on the turbine blades, selecting suitable airfoils, modifying the original airfoil shape, and adding other devices to the blades. The proposed method is to add a passive vortex generator device, which generates vortex flow to delay the separation flow at the surface, thereby increasing efficiency. Initially, VGs were used on aircraft wings to improve stability and performance efficiency; later, they were developed for other transport industries, such as cars, trucks, high-speed trains, and ships. In

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17

Özden, Mustafa, Mustafa Serdar Genç, and Kemal Koca. "Passive Flow Control Application Using Single and Double Vortex Generator on S809 Wind Turbine Airfoil." Energies 16, no. 14 (2023): 5339. http://dx.doi.org/10.3390/en16145339.

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The current study is aimed at investigating the influences of vortex generator (VG) applications mounted to the suction and pressure surfaces of the S809 wind turbine airfoil at low Reynolds number flow conditions. Both single and double VG applications were investigated to provide technological advancement in wind turbine blades by optimizing their exact positions on the surface of the airfoil. The results of the smoke-wire experiment for the uncontrolled case reveal that a laminar separation bubble formed near the trailing edge of the suction surface, and it was moved towards the leading edg

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18

Yudhatama, A. R., A. G. Safitra, and D. Satrio. "Numerical Simulation of Low Pressure Evaporator Modified with Vortex Generator for Improving the Heat Transfer Characteristics." IOP Conference Series: Earth and Environmental Science 972, no. 1 (2022): 012066. http://dx.doi.org/10.1088/1755-1315/972/1/012066.

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Abstract Heat Recovery Steam Generator (HRSG) is a crucial component in the combined cycle power plant, which utilises gas turbine exhaust gases to heat water into further hot steam. Research is needed to improve the heat transfer process in the LP Evaporator. One way to increase the heat transfer is by adding a Vortex Generator (VG) to the LP evaporator. The Vortex Generator itself is a vortex generator that aims to make the fluid flow from the gas turbine not only hit the tube banks in the HRSG but also between the tubes installed a Vortex Generator, which functions to make the fluid flow th

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19

Syaiful, Syaiful, MSK Tony Suryo Utomo, and Hengky Dwi Febriandy. "Efek Sudut Serang Concave Delta Winglet Vortex Generators Terhadap Kenaikan Laju Perpindahan Panas Di Dalam Aliran Fluida." ROTASI 20, no. 2 (2018): 124. http://dx.doi.org/10.14710/rotasi.20.2.124-129.

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Fin and tube heat exchanger adalah salah satu penukar kalor compact yang digunakan dalam berbagai aplikasi, seperti pada industri petroleum, industri kimia, industri HVAC dan indistri otomotif. Oleh karena itu peningkatan performa termal pada heat exchanger perlu untuk dilakukan. Salah satu cara untuk meningkatkan performa termal pada heat exchanger adalah dengan meningkatkan koefisien perpindahan panas konveksi pada fluida. Pada studi sekarang ini, eksperimen dilakukan untuk mengetahui beberapa parameter yang mempengaruhi perbaikan perpindahan panas. Eksperimental dilakukan dengan memasang vo

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20

Terekhov, V. I., A. Yu Dyachenko, V. L. Zhdanov, Ya J. Smulsky, and K. A. Sharov. "Features of air flow and heat transfer control behind a backward-facing step using a vortex generator pair." Journal of Physics: Conference Series 2057, no. 1 (2021): 012011. http://dx.doi.org/10.1088/1742-6596/2057/1/012011.

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Abstract The paper presents experimental results on the study of flow dynamics and heat transfer in the separation region behind the backward-facing step with longitudinal vortex generators (VG) installed at an angle to the flow of 30° at Re = 4000. The VG installation reduces the recirculation region and the induced longitudinal vortices and rearranges the flow structure in the separation region. The influence of a VG on the local and average thermal characteristics behind the backward-facing step is investigated and their thermohydraulic efficiency is estimated.

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فاضل محمود, عباس. "AN EXPERIMENTAL STUDY OF THE EFFECT OF VORTEX GENERATOR ON THE FLAT-PLATE BOUNDARY LAYER." iraq journal of market research and consumer protection 13, no. 2 (2021): 68–78. http://dx.doi.org/10.28936/jmracpc13.2.2021.(6).

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This paper is dealing with an experimental study to show the influence of the geometric characteristics of the vortex generators VG son the thickness of the boundary layer (∂) and drag coefficients (CD) of the flat plate. Vortex generators work effectively on medium and high angles of attack, since they are "hidden" under the boundary layer and practically ineffective at low angles. The height of VGs relative to the thickness of the boundary layer enables us to study the efficacy of VGs in delaying boundary layer separation. The distance between two VGs also has an effect on the boundary layer

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22

Paul, Akshoy Ranjan, Shrey Joshi, Aman Jindal, Shivam P. Maurya, and Anuj Jain. "Experimental Studies of Active and Passive Flow Control Techniques Applied in a Twin Air-Intake." Scientific World Journal 2013 (2013): 1–8. http://dx.doi.org/10.1155/2013/523759.

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The flow control in twin air-intakes is necessary to improve the performance characteristics, since the flow traveling through curved and diffused paths becomes complex, especially after merging. The paper presents a comparison between two well-known techniques of flow control: active and passive. It presents an effective design of a vortex generator jet (VGJ) and a vane-type passive vortex generator (VG) and uses them in twin air-intake duct in different combinations to establish their effectiveness in improving the performance characteristics. The VGJ is designed to insert flow from side wal

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23

Akcayoglu, Azize, Halil Cebeci, and Celal Nazli. "Thermo-Hydraulic Performance Evaluation of Inclined Vortex Generators." Advanced Materials Research 853 (December 2013): 317–22. http://dx.doi.org/10.4028/www.scientific.net/amr.853.317.

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In the present study, a commercial finite volume package ANSYS FLUENT 14.5 has been used to determine thermo-hydraulic performance of two different vortex generator (VG) configurations, namely, flow-up and flow-down, located in triangular ducts. A comprehensive literature survey on flow-up and flow-down configurations has shown that there are completely opposite results obtained in terms of performance of the two configurations. In some studies, flow-up configuration showed better performance characteristics over flow-down configuration while in other studies flow-down configuration was found

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24

Liu, Kai, Yangyang Guo, and Jiangbo Wang. "Heat transfer mechanism of different vortex generators arrangements embedded in heat exchange tubes." Journal of Physics: Conference Series 2756, no. 1 (2024): 012045. http://dx.doi.org/10.1088/1742-6596/2756/1/012045.

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Abstract Heat exchange is widely used in many fields to improve heat transfer efficiency and save energy, while longitudinal vortex generator (VG) is widely used in many heat transfer heat exchangers. In this work, the effect of VGs with different numbers and different pitch ratios (PR) on the heat transfer characteristics in the tube was studied numerically. The results show that when the fluid flows through the VG, the reflux region will be generated, and the fluid velocity in the reflux region will be inhibited, resulting in uneven temperature distribution and increased Nu. When multiple VG

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Zastawny, M. "Numerical simulation of wing vortex generators – methodologies and validation." Aeronautical Journal 120, no. 1226 (2016): 627–50. http://dx.doi.org/10.1017/aer.2016.13.

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ABSTRACTThis paper presents the results of a study of different Vortex Generator (VG) modelling approaches that have been performed in order to develop a better understanding of the current Computational Fluid Dynamics (CFD) capability to simulate transonic flows where wing-mounted VGs are present.The practicality of using CFD methods commonly employed in the aerospace industry to predict the influence of VGs on wing performance is studied. It is hoped that presenting the experience gained will be of value to aerodynamicists working on similar problems in industry. An approach, using fully res

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Mukut, A. N. M. M. I., and H. M. M. Afroz. "Numerical investigation of double sided plasma vortex generator in separation control." Fluid Dynamics Research 54, no. 1 (2022): 015508. http://dx.doi.org/10.1088/1873-7005/ac505d.

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Abstract Control of flow separation is a great issue to deal with a moving body to ensure its proper aerodynamic characteristics. To achieve this, various methods including active and passive control are suggested depends upon the flow characteristics and the surface in which control is necessary. To make the better use of both active and passive method of flow control this article proposed a new type of double sided plasma actuator (DSPVG) to overcome the drag penalty of conventional vortex generators (VGs) that commonly used in controlling flow and to use actively control. In this regard, th

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Wang, Jiangbo, Ting Fu, Liangcai Zeng, Guang Chen, and Fue-sang Lien. "Numerical and Experimental Investigations of Micro Thermal Performance in a Tube with Delta Winglet Pairs." Micromachines 12, no. 7 (2021): 786. http://dx.doi.org/10.3390/mi12070786.

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In this research, a novel vortex generator (VG) is presented. The experimental and numerical investigations were carried out to study the micro thermal-hydraulic performance in a heated tube. The numerical results showed that the fluid in the core flow region and the near-wall region was fully mixed because of the longitudinal vortices created by the vortex generators. In addition, the experimental results showed that the heat transfer coefficient (h) decreased with the increasing pitch ratio (PR) value, while the friction coefficient exhibited the opposite trend. With the increasing ration an

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Nejati Barzoki, Faezeh, Ghanbar Ali Sheikhzadeh, Morteza Khoshvaght Aliabadi, and Ali Akbar Abbasian Arani. "Assessment of vortex generator shapes for enhancing thermohydraulic performance of fluid flow in a channel equipped with perforated chevron plate-fin." International Journal of Numerical Methods for Heat & Fluid Flow 31, no. 6 (2021): 1790–815. http://dx.doi.org/10.1108/hff-02-2020-0087.

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Purpose The purpose of this paper is to investigate thermohydraulic characteristics of turbulent flow of water (4,000 = Re = 10,000) in a rectangular channel equipped with perforated chevron plat-fin (PCPF) with different vortex generators (VGs) shapes. Design/methodology/approach First, three general shapes of VGs including rectangular, triangular and half circle, are compared to each other. Then, the various shapes of rectangular VGs, (horizontal, vertical and square) and triangular VGs, (forward, backward and symmetric) are evaluated. To comprehensively evaluate the thermohydraulic performa

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Mukut, A. N. M. Mominul Islam, Hasan Mohamamad Mostofa Afroz, Hiroshi Mizunuma, and Hiromichi Obara. "Evaluation of Double-Sided Plasma Vortex Generator in Comparison with Vane Vortex Generator on Separation Control." International Journal of Automotive and Mechanical Engineering 19, no. 1 (2022): 9433–46. http://dx.doi.org/10.15282/ijame.19.1.2022.07.0726.

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The present research has introduced a new type of Plasma Vortex Generator named as Double-Sided Plasma Vortex Generator (DSPVG) that has dual expose electrodes on both sides. This DSPVG is placed normal to the surface parallel to incoming air and creates vortices on it’s both sides. As conventional VG has an angle with flow direction which introduce device drag, to overcome this, DSPVG is placed with zero angle with flow direction; besides due to the smaller thickness and frontal area with incoming air than VGs, the drag penalty due to its geometry is minimised. Furthermore, as vortices are cr

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Sanjay D. Patil, Vikas T. Mujmule, Ajay P. Mahale, Suhas A. Jagtap, and Ganesh S. Patil. "Effects of Vortex Generators on Aerodynamic Drag Force in the Hatchback Type Car." ARAI Journal of Mobility Technology 2, no. 2 (2022): 183–91. http://dx.doi.org/10.37285/ajmt.1.2.3.

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Aerodynamic drag force is one of the main obstacles on moving a vehicle. This force significantly reduces a vehicle's speed and, as a result, its fuel efficiency. In today’s scenario, fuel efficiency is a prime concern in vehicle design, so a reduction in aerodynamic drag force is highly important. Road vehicles are designed to pass through surrounding air and displace it as efficiently as possible. Due to the rear shape of a car, airflow suddenly separates from the vehicle at a point near the rear windscreen. This flow separation at the rear end of the car is responsible for the drag force, w

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Zhou, J. M., Z. J. Wang, L. Chen, X. Q. Ma, and R. Dai. "Experimental study on restraining outflow distortion of a waterjet inlet using vortex generator jets." Journal of Physics: Conference Series 2707, no. 1 (2024): 012082. http://dx.doi.org/10.1088/1742-6596/2707/1/012082.

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Abstract The internal flow of the flush-type waterjet intake duct is simulated through an experiment in a low speed wind tunnel. The distributions of static pressure along the intake duct wall and the total pressure in the pump face plane are measured to investigate the influence of the vortex generator jet (VGJ) on the outflow behavior. Test cases were screened by Taguchi method. Experiment results verify a pair of VG jets with a blowing ratio 2 and lateral spacing 4 has the best performance. The inlet’s outflow is improved that total pressure recovery coefficient is raised from 0.712 to 0.77

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Moon, Hyeon-Gi, Sunho Park, Kwangtae Ha, and Jae-Ho Jeong. "CFD-Based In-Depth Investigation of the Effects of the Shape and Layout of a Vortex Generator on the Aerodynamic Performance of a Multi-MW Wind Turbine." Applied Sciences 11, no. 22 (2021): 10764. http://dx.doi.org/10.3390/app112210764.

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Thick airfoils are conventionally adopted in the blade root region of a wind turbine to ensure structural safety under extreme conditions, despite the resulting power loss. To prevent this loss, a passive flow control device known as a vortex generator (VG) is installed at the starting point of the stall to control the flow field near the wall of the suction surface. In this study, we used computational fluid dynamics (CFD) to investigate the aerodynamic characteristics induced as a result of the shape and layout of the VG on a multi-MW wind turbine blade. The separated and vortical flow behav

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Joardar, A., and A. M. Jacobi. "A Numerical Study of Flow and Heat Transfer Enhancement Using an Array of Delta-Winglet Vortex Generators in a Fin-and-Tube Heat Exchanger." Journal of Heat Transfer 129, no. 9 (2006): 1156–67. http://dx.doi.org/10.1115/1.2740308.

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This work is aimed at assessing the potential of winglet-type vortex generator (VG) “arrays” for multirow inline-tube heat exchangers with an emphasis on providing fundamental understanding of the relation between local flow behavior and heat transfer enhancement mechanisms. Three different winglet configurations in common-flow-up arrangement are analyzed in the seven-row compact fin-and-tube heat exchanger: (a) single–VG pair; (b) a 3VG-inline array (alternating tube row); and (c) a 3VG-staggered array. The numerical study involves three-dimensional time-dependent modeling of unsteady laminar

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T., Paramesh, Tshering Tenzin, Mohammad Sarwar, Ahmad Mujeeb Azizi, Habte Getaneh, and Tamal Jana. "Improvement of Aerodynamic Performance of NACA 2412 Airfoil using Active and Passive Control Techniques." WSEAS TRANSACTIONS ON FLUID MECHANICS 19 (May 14, 2024): 200–207. http://dx.doi.org/10.37394/232013.2024.19.20.

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The study of aerodynamic characteristics plays a crucial role in the design and performance evaluation of various airfoil profiles. In this study, a comprehensive investigation of the modified NACA 2412 airfoil has been carried out, focusing on its aerodynamic characteristics and performance. To improve the aerodynamic characteristics and to delay the stall, active and passive control techniques are introduced. The computational investigation is carried out using commercial software Ansys Fluent. Especially, the Reynolds-Averaged Navier Stokes (RANS) equation is numerically computed employing

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Ali Sabri Abbas and Ayad Ali Mohammed. "Improvement of Plate-Fin Heat Exchanger Performance with Assistance of Various Types of Vortex Generator." CFD Letters 15, no. 7 (2023): 131–47. http://dx.doi.org/10.37934/cfdl.15.7.131147.

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A 3-dimensional incompressible laminar flow and heat-transfer in a plate-fin heat exchanger (PFHE) where investigated numerically in this article. The influence of mounting a longitudinal vortex generator (LVG) on the offset rectangular-triangular fin (ORT) in the PFHE, on thermal and hydro-dynamic fields are presented. The novelty of this study is by attaching a LVG to an offset strip fin (OSF) surface. The cases of study for the PFHE are established, by using a built-in rectangular winglet pair type RWP longitudinal vortex generator carried out and fitted on this fin to improve the convectiv

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Ibarra-Udaeta, Iosu, Koldo Portal-Porras, Alejandro Ballesteros-Coll, Unai Fernandez-Gamiz, and Javier Sancho. "Accuracy of the Cell-Set Model on a Single Vane-Type Vortex Generator in Negligible Streamwise Pressure Gradient Flow with RANS and LES." Journal of Marine Science and Engineering 8, no. 12 (2020): 982. http://dx.doi.org/10.3390/jmse8120982.

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Passive flow control devices are included in the design of wind turbine blades in order to obtain better performance and reduce loads without consuming any external energy. Vortex Generators are one of the most popular flow control devices, whose main objective is to delay the flow separation and increase the maximum lift coefficient. Computational Fluid Dynamics (CFD) simulations of a Vortex Generator (VG) on a flat plate in negligible streamwise pressure gradient conditions with the fully-resolved mesh model and the cell-set model using Large Eddy Simulation (LES) and Reynolds-Averaged Navie

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Zakaria, Mohamad Shukri, Fezri Amri Rosman, Haslina Abdullah, Tuan Tee Boon, and Safarudin Ghazali Herawan. "Reducing Lithium-Ion Battery Temperature in Electric Vehicles with Vortex Generators: A CFD Approach." CFD Letters 17, no. 8 (2025): 27–40. https://doi.org/10.37934/cfdl.17.8.2740.

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Due to climate change and current air pollution levels, regulations have been established to address gas emissions and air pollution produced by the transport industry. Electric vehicles have emerged as a popular solution to these issues, thereby increasing their acceptance. Consequently, the demand for lithium-ion batteries is growing, particularly in electric vehicles. A key challenge with lithium-ion batteries is maintaining their operating temperature within the optimal range of 20-45°C. This project aims to minimise the operating temperature of these batteries by using appropriate cooling

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38

Lee, S., and E. Loth. "On ramped vanes to control normal shock boundary layer interactions." Aeronautical Journal 122, no. 1256 (2018): 1568–85. http://dx.doi.org/10.1017/aer.2018.88.

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ABSTRACTA novel vortex generator design positioned upstream of a normal shock followed by a subsequent diffuser was investigated using large eddy simulations. In particular, “ramped-vane” flow control devices with three different heights relative to the incoming boundary layer thickness (0.34δ, 0.52δ and 0·75δ) were placed in a supersonic boundary layer with a freestream Mach number of 1.3 and a Reynolds number of 2400 based on the momentum thickness. This is the first numerical study to investigate the size effect of the ramped-vane for flow control device in terms of shape factor, flow separ

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Mohd Salleh, Nursyaira, Mohamad Shukri Zakaria, Mohd Juzaila Abd Latif, and Adi Azriff Basri. "A Computational Study of a Passive Flow Device in a Mechanical Heart Valve for the Anatomic Aorta and the Axisymmetric Aorta." CFD Letters 13, no. 4 (2021): 69–79. http://dx.doi.org/10.37934/cfdl.13.4.6979.

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Artificial heart valves for replacing diseased indigenous heart valves were widely used. The treatment of certain types of heart disease requires mechanical valves to be implanted operatively. Healthy cardiac valves are essential to proper cardiac function. The current study presents an investigation of the pulsatile blood flow through a bileaflet mechanical heart valve (BMHV) with a vortex generator (VG) in fully open position. A St. Jude Medical Regent valve with a diameter of 23 mm was used to mount triangular VGs as a means of improving pressure gradients and reducing turbulence. The anato

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Smith, F. T. "Theoretical prediction and design for vortex generators in turbulent boundary layers." Journal of Fluid Mechanics 270 (July 10, 1994): 91–132. http://dx.doi.org/10.1017/s0022112094004210.

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A theoretical study is presented of three-dimensional turbulent flow provoked in a boundary layer by an array of low-profile vortex generators (VGs) on the surface. The typical VG sits in the logarithmic region of the incident boundary layer, and the turbulence model used seems representative in this region. The governing equations yield a forward-marching three-dimensional vortex-type system, which is solved computationally and analytically for spanwise periodic VG arrays. Streamwise vortex patterns of various strengths are produced downstream, owing to three-dimensional distortion of the ori

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Fernandez-Gamiz, Unai, Jon Ruiz de Loizaga, Iñigo Errasti, Ana Boyano, Ekaitz Zulueta, and Jose Manuel Lopez-Guede. "Computational modelling of TRIANGULAR sub-boundary-layer vortex generators." MATEC Web of Conferences 307 (2020): 01054. http://dx.doi.org/10.1051/matecconf/202030701054.

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Vortex generators (VGs) are used increasingly more by the wind turbine manufacture industry as flow control devices to improve rotor blade aerodynamic performance. The VG height is usually designed with equal thickness of the local boundary layer at the VG position. Nevertheless, these conventional VGs may produce excess residual drag in some applications. The so-called sub boundary layer VGs can provide enough momentum transfer over a region several times their own height for effective flow-separation control with much lower drag. The main objective is to investigate how well the simulations

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Terekhov, V. I., A. Yu Dyachenko, V. L. Zhdanov, and Ya J. Smulsky. "Heat transfer behind the backward-facing step in the presence of longitudinal vortex generators installed at an angle to each other." Journal of Physics: Conference Series 2119, no. 1 (2021): 012013. http://dx.doi.org/10.1088/1742-6596/2119/1/012013.

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Abstract The paper presents the experimental results on the control of heat transfer enhancement behind the backward-facing step at Re = 4000. The flow is controlled by a pair of longitudinal vortex generators (LVGs) installed at the step edge. The pair of vortex generators (VG) consists of two plates positioned symmetrically relative to the flow. The influence of the height, the angle of VG installation relative to the flow, the distance between VG pairs and the shape of the plate on local and average heat transfer is investigated.

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Tebbiche, Hocine, and Mohamed S. Boutoudj. "Vortex Generators Contribution to the Enhancement of the Aerodynamic Performances." Advanced Materials Research 950 (June 2014): 268–74. http://dx.doi.org/10.4028/www.scientific.net/amr.950.268.

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This study interest flow control using a new vortex generators (VGs) shape with counter-rotating vortices, obtained by adding a new element to a configuration mostly investigated. The experiments were performed in the aim to determine the VGs answer when placed on the suction face at 10% from the leading edge of an airfoil Naca 0015 in order to improve the lift and drag coefficients. The investigations were accomplished in wind tunnel for two Reynolds numbers and geometrical vortex generators configurations. The obtained results are analyzed according to several parameters such as the VG heigh

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Gao, S. D., L. B. Wang, Y. H. Zhang, and F. Ke. "The Optimum Height of Winglet Vortex Generators Mounted on Three-Row Flat Tube Bank Fin." Journal of Heat Transfer 125, no. 6 (2003): 1007–16. http://dx.doi.org/10.1115/1.1621900.

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Winglet vortex generators can be used to enhance the heat transfer performance of finned flat tube bank fin. The effects of the height of vortex generators (VG) on local heat transfer were studied using the naphthalene sublimation method and the optimum height of winglet VG are screened by using JF, a dimensionless factor of the larger the better characteristics. In order to get JF, the local heat transfer coefficient obtained in experiments and a numerical method were used to get the heat transferred from the fin. For the configurations studied in this paper: for local characteristic, as incr

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Nikolaou, I. G., E. S. Politis, and P. K. Chaviaropoulos. "Modelling the Flow Around Airfoils Equipped with Vortex Generators Using a Modified 2D Navier–Stokes Solver." Journal of Solar Energy Engineering 127, no. 2 (2005): 223–33. http://dx.doi.org/10.1115/1.1850486.

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Vortex generators (VGs) are commonly used for trimming the aerodynamic and aeroelastic performance of wind turbine blades by delaying flow separation. There is therefore a need for the development of reliable, still computationally affordable, models for blade designers to use to predict and enhance the aerodynamic characteristics of airfoils equipped with VGs. Such a model is proposed in the present paper, addressing in particular near-stall and post-stall airfoil performance. Starting from the three-dimensional Navier–Stokes equations that essentially describe the complex flow around a blade

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Chillon, Sergio, Antxon Uriarte-Uriarte, Iñigo Aramendia, Pablo Martínez-Filgueira, Unai Fernandez-Gamiz, and Iosu Ibarra-Udaeta. "jBAY Modeling of Vane-Type Vortex Generators and Study on Airfoil Aerodynamic Performance." Energies 13, no. 10 (2020): 2423. http://dx.doi.org/10.3390/en13102423.

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The increased demand for wind power is related to changes in the sizes of wind turbines and the development of flow control devices, such as vortex generators (VGs). In the present study, an analysis of the vortices generated by a vane-type VG is performed. To that end, the aerodynamic performance of a DU97W300 airfoil with and without VG is evaluated. The jBAY source term model was implemented for simulation of a triangular-shaped VG and the resolution of the fully meshed computational fluid dynamics (CFD) model. Reynolds-averaged Navier–Stokes (RANS) based simulations were used to calculate

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Chung, Ping-Han, Yi-Xuan Huang, Kung-Ming Chung, Chih-Yung Huang, and Sergey Isaev. "Effective Distance for Vortex Generators in High Subsonic Flows." Aerospace 10, no. 4 (2023): 369. http://dx.doi.org/10.3390/aerospace10040369.

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Vortex generators (VGs) are a passive method by which to alleviate boundary layer separation (BLS). The device-induced streamwise vortices propagate downstream. There is then lift-off from the surface and the vortex decays. The effectiveness of VGs depends on their geometrical configuration, spacing, and flow characteristics. In a high-speed flow regime, the VGs must be properly positioned upstream of the BLS region. Measurements using discrete pressure taps and pressure-sensitive paint (PSP) show that there is an increase in the upstream surface pressure and the downstream favorable pressure

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Mohd Rosli, Mohd Afzanizam, Singgih Dwi Prasetyo, Dominicus Danardono Dwi Prija Tjahjana, Alfian Fahrul Yuliansyah, and Zainal Arifin. "Effect of Hole Geometry Shape in Vortex Generators on Fluid Output Temperature: Computational Fluids Dynamics Validation." Mekanika: Majalah Ilmiah Mekanika 22, no. 2 (2023): 59. http://dx.doi.org/10.20961/mekanika.v22i2.71340.

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<p>Several methods to enhance heat transfer can be classified into three categories: active, passive, or hybrid. Among these methods, Vortex Generators (VGs) are one passive heat transfer enhancement device widely used in heat exchangers. This study aims to explore the geometric shapes of VGs equipped with longitudinal holes and examine their influence on the outlet temperature of the fluid. For the analysis in this research, a three-dimensional Computational Fluid Dynamics (CFD) simulation using ANSYS Fluent software was employed. The increased heat transfer and flow resistance in the V

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Wang, Yuwei, Qingqing Ye, and Xueming Shao. "Tip vortex cavitation control by the micro vortex generator." Physics of Fluids 37, no. 2 (2025). https://doi.org/10.1063/5.0252143.

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The present study investigates the control effect of a vane-shaped micro vortex generator (VG) on the inception and development of tip vortex cavitation. Five different arrangements were tested by varying the position and installation angle near the tip of a NACA (National Advisory Committee for Aeronautics) 662-415 hydrofoil. The spatial and temporal evolution of the tip vortex cavity was captured using high-speed imaging. The result shows that VG can induce both streamwise vortices and bubbles that affect the cavitation inception. When the VGs are aligned parallel to the incoming flow direct

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Zong, Siyu, Yankui Wang, and Zhongyang Qi. "Control characteristics of vortex-generator height on asymmetric flow over a blunt-nose body." Physics of Fluids 37, no. 2 (2025). https://doi.org/10.1063/5.0252930.

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The study investigates the control characteristics of vortex-generator (VG) on asymmetric flow over a blunt-nose body at a high angle of attack by introducing the key parameter of height ratio (h/D), in which h stands for the height of VG and D is the diameter of the slender body. The results indicate that the two asymmetric vortex patterns emerge at different heights. When a VG of small h/D is applied to the nose, it induces flow acceleration, allowing the flow to acquire additional energy. This results in delayed flow separation and the formation of a low vortex on the VG side. As the height

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