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Journal articles on the topic 'Vanes'

Author: Grafiati

Published: 4 June 2021

Last updated: 26 July 2025

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1

Simon, H., T. Wallmann, and T. Mo¨nk. "Improvements in Performance Characteristics of Single-Stage and Multistage Centrifugal Compressors by Simultaneous Adjustments of Inlet Guide Vanes and Diffuser Vanes." Journal of Turbomachinery 109, no. 1 (1987): 41–47. http://dx.doi.org/10.1115/1.3262068.

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Nowadays, multistage geared centrifugal compressors are most often equipped with three-dimensional impellers and adjustable inlet guide vane cascades, at least upstream of the first stage. Optimum stage efficiencies are made possible by optimum axial in-flow into each stage and freely selectable pinion shaft speeds. Combined with intercooling of the medium, the result is high machine efficiency with good operating ranges. Additional increases in efficiency can be achieved by means of vaned diffusers. Due to the attendant restriction to the working range, this solution is not common in producti

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2

Jiang, P. M., and A. Whitfield. "Investigation of Vaned Diffusers as a Variable Geometry Device for Application to Turbocharger Compressors." Proceedings of the Institution of Mechanical Engineers, Part D: Journal of Automobile Engineering 206, no. 3 (1992): 209–20. http://dx.doi.org/10.1243/pime_proc_1992_206_179_02.

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The potential of guide vanes as a variable geometry device, placed in the conventional vaneless diffuser, to extend the operating range of a turbocharger compressor is investigated. Vaned diffusers are not normally employed in turbocharger applications as the consequent reduction in operating range is more damaging than the beneficial improvement in peak efficiency and pressure ratio. The variable geometry concept considered here is primarily one in which the guide vanes are introduced at the near surge flow conditions. The leading edge vane angle is set to accept the highly tangential flow at

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3

Bogdan, Mariusz, Marcin Derlatka, and Józef Błachnio. "Concept of Computer-Aided Assessment of the Technical Condition of Operated Gas Turbine Vanes." Polish Maritime Research 25, no. 3 (2018): 104–12. http://dx.doi.org/10.2478/pomr-2018-0101.

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Abstract The article presents a multi-stage algorithm for automatic (without any human, user – diagnostician intervention) detection of vanes-blades (technical objects) and their surfaces on a digital image, combined with color analysis, aimed at determining the technical condition of the tested turbine elements. The images recorded with the use of a camera, containing previously dismantled from the turbine operated stator vanes, were used as the exemplary analysis material. The paper presents the algorithm for the detection of the vanes’ airfoil surfaces with the impact of the applied techniq

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4

Zhang, M., and H. Tsukamoto. "Unsteady Hydrodynamic Forces due to Rotor-Stator Interaction on a Diffuser Pump With Identical Number of Vanes on the Impeller and Diffuser." Journal of Fluids Engineering 127, no. 4 (2005): 743–51. http://dx.doi.org/10.1115/1.1949640.

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Experimental and computational study was developed for unsteady hydrodynamic forces on a diffuser pump impeller excited by the interaction between the impeller and the vaned diffuser with the same number of vanes as impeller. Unsteady flow calculations are made using commercially available CFD software, CFX-TASCflow, as well as the two-dimensional vortex method. Calculated pressure and fluid forces on the impeller show good agreement with measured ones. It has been demonstrated that the fluid forces on the impeller with the same number of vanes as the vaned diffuser are smaller compared with o

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5

Sinha, Manish, and Joseph Katz. "Quantitative Visualization of the Flow in a Centrifugal Pump With Diffuser Vanes—I: On Flow Structures and Turbulence." Journal of Fluids Engineering 122, no. 1 (1999): 97–107. http://dx.doi.org/10.1115/1.483231.

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Particle image velocimetry measurements are used to identify the unsteady flow structures and turbulence in a transparent centrifugal pump with a vaned diffuser. The experiments are being performed in a special facility that enables simultaneous measurements of the flow between the impeller blades, the gap between the impeller and the diffuser, between the diffuser vanes and in the volute. A custom-made 2 K×2 K digital camera with a unique digital image-shifting feature is used to record the images. For the measurements made close to design conditions, phase averaged velocity and vorticity fie

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6

Shoji, H., and H. Ohashi. "Lateral Fluid Forces on Whirling Centrifugal Impeller (1st Report: Theory)." Journal of Fluids Engineering 109, no. 2 (1987): 94–99. http://dx.doi.org/10.1115/1.3242647.

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Lateral fluid forces acting on a rotating centrifugal impeller in whirling motion are analyzed using unsteady potential flow theory. Impellers operating in diffusers with and without vanes are modeled and the fluid forces calculated for different whirl speeds and flow rates. The influences of these parameters are clarified by parametric calculations. The results for whirling impellers operating in vaneless diffusers show that the fluid forces exert a damping effect on the rotor whirling motion at all operating conditions. The results for impellers operating in vaned diffusers or guide vanes sh

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7

Fu, Li, Ce Yang, Hang Zhang, Wenrui Bao, and Hanzhi Zhang. "Influence of vaned diffuser on the potential effect of volute and stall inception of centrifugal compressor." Proceedings of the Institution of Mechanical Engineers, Part D: Journal of Automobile Engineering 234, no. 10-11 (2020): 2546–60. http://dx.doi.org/10.1177/0954407020916562.

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In the automotive turbochargers centrifugal compressor, the volute has a strong potential effect, leading to circumferential nonuniformity of the impeller flow field and compressor stall. In this study, full-annulus unsteady simulations for centrifugal compressors with vaned/vaneless diffusers are carried out. The influence of the diffuser vane on the potential effect of the volute and stall behavior of a centrifugal compressor is studied in detail. Based on the distribution of the casing static pressure, the formation mechanism of the circumferential distribution of static pressure and the re

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8

Zhao, Peng-Fei, Yan Liu, and Xiao-Fang Wang. "Analysis of vortices and performance of different diffusers in a large mass flow coefficient centrifugal compressor." Proceedings of the Institution of Mechanical Engineers, Part A: Journal of Power and Energy 231, no. 4 (2017): 253–73. http://dx.doi.org/10.1177/0957650917701339.

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An appropriate diffuser following an impeller is critical to realize a high efficiency and a wide operating range for a centrifugal compressor stage. The purpose of this study is to investigate the effect of different types of vaned diffusers on a large mass flow coefficient centrifugal compressor stage performance under different operating conditions and to reveal the loss mechanisms in the vaned diffusers. Five vaned diffusers are studied. Flow fields and vortices in a conventional diffuser and a rib diffuser are first examined. Then, vortices and flow fields in three different tandem diffus

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9

Arndt, N., A. J. Acosta, C. E. Brennen, and T. K. Caughey. "Experimental Investigation of Rotor-Stator Interaction in a Centrifugal Pump With Several Vaned Diffusers." Journal of Turbomachinery 112, no. 1 (1990): 98–108. http://dx.doi.org/10.1115/1.2927428.

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This paper describes an experimental investigation of rotor-stator interaction in a centrifugal pump with several vaned diffusers. Steady and unsteady diffuser vane pressure measurements were made for a two-dimensional test impeller. Unsteady impeller blade pressure measurements were made for a second two-dimensional impeller with blade number and blade geometry identical to the two-dimensional impeller used for the diffuser vane pressure measurements. The experiments were conducted for different flow coefficients and different radial gaps between the impeller blade trailing edge and the diffu

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10

Kurniawan, Iwan, Romy Romy, Amir Hamzah, and A. Farhan. "Experimental Analysis of Conical Basin Models with Vortex Turbines for Small-Scale Renewable Energy Generation." Journal of Ocean, Mechanical and Aerospace -science and engineering- (JOMAse) 69, no. 1 (2025): 83–90. https://doi.org/10.36842/jomase.v69i1.530.

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This study investigates the performance of Gravitational Water Vortex Turbines (GWVT) using different conical basin configurations, focusing on the impact of vane designs on turbine efficiency. Four basin models were tested: model A (no vanes), Model B (180-degree vanes), Model C (90-degree vanes), and Model D (45-degree vanes). The basin was constructed from resin mixed with fiber, with the addition of vanes designed in various configurations to enhance vortex formation and energy extraction. Experimental testing was conducted under varying load conditions, with efficiency determined by the r

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11

Wentz, Margaret R. "Weather Vanes." Mayo Clinic Proceedings 90, no. 1 (2015): e7. http://dx.doi.org/10.1016/j.mayocp.2014.10.016.

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12

Rodgers, C. "Centrifugal Compressor Inlet Guide Vanes for Increased Surge Margin." Journal of Turbomachinery 113, no. 4 (1991): 696–702. http://dx.doi.org/10.1115/1.2929136.

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This paper describes the results of compressor rig testing with a moderately high specific speed, high inducer Mack number, single-stage centrifugal compressor, with a vaned diffuser, and adjustable inlet guide vanes (IGVs). The results showed that the high-speed surge margin was considerably extended by the regulation of the IGVs, even though the vaned diffuser was apparently operating stalled. Simplified one-dimensional analysis of the impeller and diffuser performances indicated that at inducer tip Mach numbers approaching and exceeding unity, the high-speed surge line was triggered by indu

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13

Langwane, Kahuma, and N. Subaschandar. "Numerical Prediction and Reduction of Pressure Loss of Air Flow Inside a Sharp 90˚ Elbow Using Turning Vanes." WSEAS TRANSACTIONS ON FLUID MECHANICS 16 (July 27, 2021): 127–40. http://dx.doi.org/10.37394/232013.2021.16.13.

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The aim of this study is to calculate the pressure loss and the effect of turning vanes on the pressure loss incurred by the flow in a duct with a 90˚ sharp elbow using numerical fluid mechanics. The main focus this study was to calculate the effects of the number of turning vanes and the length of the turning vanes on the pressure loss. Computational Fluid Dynamics calculations have been carried out using ANSYS Workbench software. Two turbulence models have been used in these calculations. They are the standard k- and the k- turbulence models. The number and length of the vanes were changed

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14

Zhu, Honggeng, and Rentian Zhang. "Numerical Simulation of Internal Flow and Performance Prediction of Tubular Pump with Adjustable Guide Vanes." Advances in Mechanical Engineering 6 (January 1, 2014): 171504. http://dx.doi.org/10.1155/2014/171504.

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Aiming at the performance defect of tubular pump with fixed guide vanes, a design scheme of tubular pump with adjustable guide vanes is proposed, so that the inlet setting angle of guide vanes can be flexibly adjusted to coordinate with the operation conditions of pump, to ensure the inlet setting angle of guide vanes changing with the outlet flow angle of the impeller. The three-dimensional time-averaged incompressible Navier-Stokes equations are adopted to numerically simulate the internal flow field of a tubular pump with fixed and adjustable guide vanes, respectively. Computed results indi

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15

Sano, Takeshi, Yoshiki Yoshida, Yoshinobu Tsujimoto, Yuki Nakamura, and Tatsuhito Matsushima. "Numerical Study of Rotating Stall in a Pump Vaned Diffuser." Journal of Fluids Engineering 124, no. 2 (2002): 363–70. http://dx.doi.org/10.1115/1.1459076.

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This paper treats the flow instabilities in a vaned diffuser by using CFD. A commercial code with the standard κ-ε turbulence model was used for the present work. It was found that the flow instabilities in the vaned diffuser: i.e., rotating stall, alternate blade stall, and asymmetric stall, could be simulated by the present calculations. These instabilities were observed in a range with negative slope of the pressure performance curve of the diffuser. The rotating stall onset flow rate is larger for the case with larger clearance between the impeller and diffuser vanes.

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16

Ebrahimi, Mojtaba, and Seyed Ali Jazayeri. "The Inertia Force of the Vanes in the Hydraulic Vane Pump with Advanced Hypertrochoid Curve in the Inner Surface of its Stator." Applied Mechanics and Materials 325-326 (June 2013): 1440–44. http://dx.doi.org/10.4028/www.scientific.net/amm.325-326.1440.

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The possibility of application of the advanced hypertrochoid curve in the inner surface of the stator of fixed displacement hydraulic vane pump, theoretically was studied in the last our work. By considering the properties of this curve, sealing action between pressure and suction sides of the pump can be improved. One of the important characteristics of a new profile must be improving of the inertial reaction of the vanes in each position where these vanes have a radial movement because it causes a smooth sliding motion of the vanes, and hence, a higher performance of the pump while attaining

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17

Li, Yongye, Siyuan Tao, Xiaoteng Song, and Yiming Zhao. "Study on Internal Flow Characteristics of Hydrocyclone with Guide Vanes." Sustainability 15, no. 6 (2023): 5350. http://dx.doi.org/10.3390/su15065350.

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Hydrocyclone with guide vanes is one type of swirl flow launching device without energy input. For researching the flow characteristics of that hydrocyclone, the flow distribution of the sections and their variation along the flow were studied using numerical simulation and physical experiment. In addition, the flow field was convenient to be divided into three-dimensional velocities: axial velocity, circumferential velocity, radial velocity and the static pressure. The result showed that the water flow had obvious diversion by the effect of guide vanes. The axial velocity varied into the dist

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18

Poudel, R., S. Chitrakar, Z. Qian, Z. Guo, and B. Thapa. "Experimental Investigations of Sediment Erosion in Guide Vanes of Francis Turbine." IOP Conference Series: Earth and Environmental Science 1411, no. 1 (2024): 012017. https://doi.org/10.1088/1755-1315/1411/1/012017.

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Abstract Guide vanes are the cascade of hydrofoil like structures surrounding the Francis turbine runner which guides the water from spiral casing and controls the flow to the turbine. A large portion of hydraulic energy of incoming flow is converted to kinetic energy within guide vanes. Sediment erosion causes deterioration of turbine components. Guide vanes are generally eroded due to sediments at the outlet region, facing plates, and clearance gap region. This research encompasses the study of erosion in guide vanes of a 2 kW capacity Francis turbine. The guide vanes were coated with four d

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19

Palkovič, Aleš, Petr Pečený, and Jiří Teichman. "Optimization of pressure drop in curved conduits using Ansys DesignXplorer." MATEC Web of Conferences 367 (2022): 00019. http://dx.doi.org/10.1051/matecconf/202236700019.

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This paper describes the effects of guide vanes installed in curved conduits with the main emphasis on pressure loss reduction. In curved parts of conduits, eddy zones are created due to the flow separation resulting in an increased value of pressure drop. Installation of guide vanes can prevent the creation of large eddy zones. On the other hand, the cross-section of the conduit is decreased by placing the vanes, leading to the growth of the pressure drop. That is why the properties of guide vanes needed to be selected carefully. The goal of this paper is to describe the process of finding th

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20

Zhang, Qi Hua, Yan Xu, Wei Dong Shi, Wei Gang Lu, and Ling Zhou. "Research and Development on the Hydraulic Design System of the Guide Vanes of Multistage Centrifugal Pumps." Applied Mechanics and Materials 197 (September 2012): 24–30. http://dx.doi.org/10.4028/www.scientific.net/amm.197.24.

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To improve accuracy and efficiency of the hydraulic design of the guide vanes of the multistage centrifugal pumps, four different-structured guide vanes are investigated, and the design processes of those systems are established. The secondary development platforms of the ObjectArx2000 and the UG/NX OPEN are utilized to develop the hydraulic design systems of the guide vanes. The error triangle method is adopted to calculate the coordinates of the vanes, the profiles of the vanes are constructed by Bezier curves, and then the curves of the flow areas along the flow-path are calculated. Two-dim

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21

Liu, Ming, Lei Tan, and Shuliang Cao. "A review of prewhirl regulation by inlet guide vanes for compressor and pump." Proceedings of the Institution of Mechanical Engineers, Part A: Journal of Power and Energy 233, no. 6 (2018): 803–17. http://dx.doi.org/10.1177/0957650918820795.

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To achieve the energy conservation and sustainable development, the prewhirl regulation by inlet guide vanes is proposed and rapidly developed for the compressor and pump. The inlet guide vanes change the flow pattern at the impeller inlet especially the velocity circulation, and then influence the performance of compressor and pump. This paper presents and discusses researches on the prewhirl regulation by inlet guide vanes. Researches include mechanism analysis of prewhirl regulation, experimental and numerical studies on the flow field, performance of compressor and pump with inlet guide va

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22

Gallardo, Karina, Khaled Hamad, and Jorge Escobar-Ortiz. "Experimental Analysis of the Effectiveness of Submerged Vanes in Mitigating Local Scour at Quadratic Bridge Piers." Enfoque UTE 16, no. 1 (2025): 10–16. https://doi.org/10.29019/enfoqueute.1072.

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The use of submerged vanes has been experimentally validated as an effective method for controlling local scour and stabilizing riverine structures. This study evaluates the efficacy of submerged vanes in mitigating local erosion around a square bridge pier. Four experiments were conducted under controlled conditions in the sedimentation channel of the Laboratory of the Faculty of Civil and Environmental Engineering at the National Polytechnic School in Quito, Ecuador. Acrylic submerged vanes were installed upstream of the pier at a 15° attack angle relative to the flow direction, aiming to mo

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23

Gallardo, Karina, Khaled Hamad, and Jorge Escobar-Ortiz. "Experimental Analysis of the Effectiveness of Submerged Vanes in Mitigating Local Scour at Quadratic Bridge Piers." Enfoque UTE 16, no. 1 (2025): 10–16. https://doi.org/10.29019/enfoqueute.1072.

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The use of submerged vanes has been experimentally validated as an effective method for controlling local scour and stabilizing riverine structures. This study evaluates the efficacy of submerged vanes in mitigating local erosion around a square bridge pier. Four experiments were conducted under controlled conditions in the sedimentation channel of the Laboratory of the Faculty of Civil and Environmental Engineering at the National Polytechnic School in Quito, Ecuador. Acrylic submerged vanes were installed upstream of the pier at a 15° attack angle relative to the flow direction, aiming t

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24

Arndt, N., A. J. Acosta, C. E. Brennen, and T. K. Caughey. "Rotor–Stator Interaction in a Diffuser Pump." Journal of Turbomachinery 111, no. 3 (1989): 213–21. http://dx.doi.org/10.1115/1.3262258.

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The interaction between impeller blades and diffuser vanes in a diffuser pump was investigated. Steady and unsteady pressure measurements were taken on the diffuser vanes, and the shroud wall of a vaned and a vaneless diffuser. Steady, unsteady, and ensemble-averaged unsteady data, as well as frequency spectra, are presented. The measurements were made for different flow coefficients, shaft speeds, and radial gaps between impeller blade trailing and diffuser vane leading edge (1.5 and 4.5 percent based on impeller discharge radius). The resulting lift on the vane, both steady and unsteady, was

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25

Szlaga, Marek. "Balancing axial force in centrifugal pumps with pump out vanes." E3S Web of Conferences 137 (2019): 01028. http://dx.doi.org/10.1051/e3sconf/201913701028.

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Application of pump out vanes is one of the solutions to reduce hydraulic axial force generated during centrifugal pump operation. This article presents the cause of the occurrence of hydraulic axial force and method of calculating pressure distribution at the rear of the impeller used to design pump out vanes properly. It illustrates results of pump out vanes CFD calculations and its validation by measurements. The article reviews the methods of reducing pressure on the rear wall of the centrifugal pump's rotor using pump out vanes. It presents empirical formulae allowing calculation of press

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26

Takao, Shunya, Shinichi Konno, Shinichiro Ejiri, and Masahiro Miyabe. "Effect of diffuser vane slit on rotating stall behavior and pump performance in a centrifugal pump." Journal of Physics: Conference Series 2217, no. 1 (2022): 012054. http://dx.doi.org/10.1088/1742-6596/2217/1/012054.

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Abstract In the previous study of a centrifugal pump with a vaned diffuser, it was confirmed that the flowrate at the onset of rotating stall was shifted to the lower flowrate by slitting the diffuser vanes. As the CFD result, it was found that the jet flow from pressure-side to suction-side impinges backflow near the suction surface and it suppresses to expand toward the diffuser inlet. However, it is difficult to say that the optimized shape and slitting position have been sufficiently studied. Therefore, in this study, we investigated the effect of slitting on the pump performance and inter

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27

Ma, Yuanjiang, Xiaosong Pang, Zhongquan Wang, et al. "Design and Validation of a Testing Device for Sediment-Induced Erosion Based on Similarity Theory." Water 17, no. 2 (2025): 222. https://doi.org/10.3390/w17020222.

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Sediment-induced erosion is a primary cause of failure in the flow-passage components of Francis turbine units. This study adopted the Realizable k–ε turbulence model to numerically simulate the effects of sediment-induced erosion on the guide components of Francis turbines. Specifically, using flow similarity theory, a testing device suitable for studying the sediment-induced erosion behavior of turbine vanes was designed, and the similarity between the flow fields of actual vanes and testing device vanes was validated. The results revealed a high degree of consistency between the near-wall f

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28

Silvestri, Vincent, and Claudette Tabib. "Analysis of elliptic vanes." Canadian Geotechnical Journal 29, no. 6 (1992): 993–97. http://dx.doi.org/10.1139/t92-109.

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This technical note presents the results of a theoretical analysis of smooth elliptic vanes. Uniform and triangular shear stress distributions are used to obtain geometric vane factors. A preliminary field investigation has been carried out by means of two elliptic vanes. Key words : vanes, elliptic shapes, uniform, triangular, shear stress distribution, field investigation.

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Yuchuan, Wang, Tan Lei, Zhu Baoshan, Cao ShuLiang, and Wang Binbin. "Numerical investigation of influence of inlet guide vanes on unsteady flow in a centrifugal pump." Proceedings of the Institution of Mechanical Engineers, Part C: Journal of Mechanical Engineering Science 229, no. 18 (2015): 3405–16. http://dx.doi.org/10.1177/0954406215570105.

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The influence of inlet guide vanes on unsteady flow in a centrifugal pump is numerically investigated. The independences of mesh elements, time steps and turbulence models are studied, and the satisfactory agreement between experimental and numerical results of the centrifugal pump performance validates the reliability and accuracy of the numerical model. The frequency characteristics of pressure fluctuations in impeller and volute are nearly the same for the pump without and with inlet guide vanes in the angle range from −36° to +36°. In the pump impeller, the dominant frequencies are mainly

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Bor, Aslı. "Experimental investigation of 90° intake flow patterns with and without submerged vanes under sediment feeding conditions." Canadian Journal of Civil Engineering 49, no. 3 (2022): 452–63. http://dx.doi.org/10.1139/cjce-2020-0616.

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In this study, two experiments were conducted in a 90° water intake to study 3D flow patterns and sediment distribution using submerged vanes under sediment feeding and live-bed conditions. One column three vanes were installed at a 20° angle maintaining for a water discharge ratio of qr ≈ 0.1. Three-dimensional mean and turbulent velocity components of flow in a 90° channel intake were measured using acoustic Doppler velocimetry (ADV). Flow characteristics of the intake structure area with no vanes were compared with these conditions. Results showed that three vanes with a single column reduc

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Yadagiri Rapolu, Ganesh, Siddharth Swaminathan Balachandar, and Keerthi Vallarasu Kamaraj. "Numerical Investigation: Effect of Stator Vanes on Turbocharger Turbine Performance." International Journal of Rotating Machinery 2014 (2014): 1–11. http://dx.doi.org/10.1155/2014/984094.

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With reduced turbo lag and better transient response, the introduction of VTG stator guide vanes improved turbocharger performance at all the engine operating conditions. The VTG system accelerates and maneuvers exhaust gas flow to the turbine. Favorable flow conditions at turbine inlet created by vane shape improve turbine performance. At lower engine speed, it is observed that the pressure drop across vane system influences overall efficiency. Whereas at higher speed, the pressure drop and guide vane exit flow angle are found to determine the turbine efficiency. Successful practical operatio

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G, AMUTHAN, PALANISWAMY P T, RAGHUPATHY R, and KALLAPPAN R. "Optimisation of the parameters related to sunflower seed shelling." Madras Agricultural Journal 88, March (2001): 83–85. http://dx.doi.org/10.29321/maj.10.a00308.

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In this study shelling of sunflower seed (Co 2 variety) was carried out in a centrifugal dehusker and the various crop and machine parameters were optimized by evaluating the performance of the centrifugal dehusker. The parameters studied were moisture content of the seed at 4 levels viz. 6.5, 9, 12 and 15 per cent (w.b.), peripheral speed of the impeller at 4 levels viz. 1700, 2000, 2300 and 2600 m/min., radius of curvature of the vanes at 4 levels viz 6. 8, 10 and 12 cm and the number of vanes in the impeller at 3 levels viz. 3, 4 and 5 number of vanes. The feed rate was maintained throughou

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33

Ichsan, Nur, Dwi Anung Nindito, and Raden Haryo Saputra. "Uji Eksperimental Pengaruh Dimensi Lebar Rectifier Guide Vanes terhadap Kinerja Turbin Hidrokinetik Savonius." RekaRacana: Jurnal Teknil Sipil 7, no. 2 (2021): 96. http://dx.doi.org/10.26760/rekaracana.v7i2.96.

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ABSTRAKKarakteristik blade sisi cekung turbin hidrokinetik Savonius yang memiliki nilai torsi negatif mengakibatkan kelemahan berupa efisiensi turbin yang relatif rendah, sehingga diperlukan sistem pengarah aliran berupa rectifier guide vane. Studi ini bertujuan membandingkan performa yang dihasilkan turbin Savonius tanpa guide vanes dan turbin Savonius menggunakan guide vanes dengan memvariasikan lebar rectifier L=Rt/4, L=Rt/2 dan L=3Rt/4, dimana Rt adalah jari-jari turbin. Metode pengujian dilakukan secara eksperimental di saluran prismatik dengan kecepatan aliran 0,111–0,1415 m/s. Hasil stu

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Al-Obaidi, Ahmed Ramadhan. "Influence of guide vanes on the flow fields and performance of axial pump under unsteady flow conditions: Numerical study." Journal of Mechanical Engineering and Sciences 14, no. 2 (2020): 6570–93. http://dx.doi.org/10.15282/jmes.14.2.2020.04.0516.

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Influence of different guide vanes on structural of flow field and axial pump performance under unsteady flow is carried out using numerical method. A three-dimensional axial flow pump model is numerically simulated using computational fluid dynamics (CFD) method with four number of impeller blades and 3, 4, 5 and 6 guide vanes depend on the SIMPLE code, standard turbulence k-ε model as well as sliding mesh method (SMM). The static, dynamic, total pressures, shear stress, velocity magnitude and turbulent kinetic energy are the important features which affecting instability operation in the pum

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Cao, Hui, Zhenggui Zhou, and Jinhuan Zhang. "Aerodynamic design schemes of the inlet guide vane in a core-driven fan stage." Advances in Mechanical Engineering 10, no. 1 (2018): 168781401774770. http://dx.doi.org/10.1177/1687814017747707.

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A core-driven fan stage operates in both single bypass and double bypass modes. There are large differences in aerodynamic parameters between the two modes. To accommodate the differences, the inlet guide vanes must turn in a very large angle, which may cause significant flow losses. To reduce the flow losses, this article investigates three design schemes in detail using the flow field simulation method. The three schemes investigated include the inlet guide vanes adjusting entirely (Scheme 1), the rear part of the inlet guide vanes adjusting (Scheme 2), and both the front and rear part of th

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Liu, Fu Chun, Jian Rong Zhang, and Dong Wang. "Influence of the Distribution of Dual Cascades on Double Vanes Based on the Solid-Liquid Two-Phase Flow." Applied Mechanics and Materials 723 (January 2015): 186–89. http://dx.doi.org/10.4028/www.scientific.net/amm.723.186.

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The relative positional relationship between the stay vanes and guide vanes is researched to analyze the impact on the hydraulic performance of the Turbine based on N-S equations and RNG k-ε turbulence model under the conditions of sandy water with the numerical simulation method.There are main five kinds of the relative positional relationship between the dual cascades is used to analyse the trends of the distribution about the pressure and velocity. The relative circumferential positions between the dual cascades have obviously effect on the flow verified.And the velocity vector and the pres

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37

Hajiahmadi, Amin, Mohammad J. Khanjani, Mojtaba Saneie, and Mehdi Azhdari Moghaddam. "Laboratory Investigation of the Effect of the Size of Orifice on the Performance of Curvature Submerge Vanes for Sediment Leaching of the Vortex Settling Basin’s Floor." Acta Universitatis Agriculturae et Silviculturae Mendelianae Brunensis 64, no. 3 (2016): 781–89. http://dx.doi.org/10.11118/actaun201664030781.

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In this paper, considering the accumulation of the sediments on the floor of the vortex settling basin during sediment extracting, curvature submerge vanes were used on the floor of the vortex basin and the effect of the size of the orifice was studied on the performance of the curvature submerge vanes for sediment leaching of the floor of the basin. Experiments were performed on a physical model with a height of 90 cm and a diameter of 206 cm and a floor slope of 10% and also three orifices were used with diameters of 59, 46 and 36 mm. The submerge vanes were placed in different arrangements

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Khoeini, D., and E. Shirani. "Influences of Diffuser Vanes Parameters and Impeller Micro Grooves Depth on the Vertically Suspended Centrifugal Pump Performance." Journal of Mechanics 35, no. 5 (2019): 735–46. http://dx.doi.org/10.1017/jmech.2019.13.

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ABSTRACTEffects of geometric parameters of diffuser vanes as well as impeller micro grooves depth on the performance of a vertically suspended centrifugal pump have been studied. Different diffuser vanes height,leading angles, trailing angles, wrapping angles and furthermore, impeller micro grooves depths have been analyzed thoroughly. Numerical results have been verified by comparing experimental data. Results, without considering cavitation, reveal that diffuser vanes height has the profound impact on the vertically suspended centrifugal pump performance followed by vanes wrapping angle. Add

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Serrano, José Ramón, Andrés Omar Tiseira, Juan Antonio López-Carrillo, and Natalia Hervás-Gómez. "Numerical Evaluation in a Scaled Rotor-Less Nozzle Vaned Radial Turbine Model under Variable Geometry Conditions." Applied Sciences 12, no. 14 (2022): 7254. http://dx.doi.org/10.3390/app12147254.

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The widespread trend of pursuing higher efficiencies in radial turbochargers led to the prompting of this work. A 3D-printed model of the static parts of a radial variable geometry turbine, the vaned nozzle, and the volute, was developed. This model was up-scaled from the actual reference turbine to place sensors and characterize the flow around the nozzle vanes, including the tip gap. In this study, a computational model of the scaled-up turbine was carried out to verify the results in two ways. For this model, firstly compared with an already validated CFD turbine model of the real device (w

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Savin, V. Yu, and V. Yu Ilyichev. "STUDY OF TORQUE NONUNIFORMITY IN DOUBLE-ACTION HYDRAULIC ROTARY VANE MO-TORS." Herald of Dagestan State Technical University. Technical Sciences 47, no. 1 (2020): 39–47. http://dx.doi.org/10.21822/2073-6185-2020-47-1-39-47.

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Abstract. Aim. Hydraulic rotary vane motors rely on the principle of torque maintained at a nominal pressure. In this case, the most important parameter of the torque is its nonuniformity. The problem of determining nonuniform torque in hydraulic motors having ten and twelve vanes is investigated with the aim of ensuring the maximum stability of this parameter.Method. Braking torque occurs on the vanes of hydraulic rotary vane motors due to the pressure of the working fluid on the stator; the theoretical expression for torque does not take the braking effect of the vanes into account. Therefor

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Fulton, John P., Ravinder K. Thaper, Simerjeet S. Virk, Timothy McDonald, and Oladiran Fasina. "Effect of Vane Shape on Fertilizer Distribution for a Dual-Disc Spinner Spreader." Applied Engineering in Agriculture 36, no. 5 (2020): 743–51. http://dx.doi.org/10.13031/aea.13634.

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Abstract.Spinner-disc spreaders are commonly used for application of granular fertilizers with components (divider, spinner-discs, and vanes) influencing material flow behavior and distribution. Fertilizer ricocheting off these components is an uncontrolled aspect of material flow that negatively impacts spread uniformity. Therefore, an investigation using potash (KCl) was conducted to understand the impact of vane shape on fertilizer flow, ricocheting and distribution for a dual-disc spinner spreader. Four different vane shapes were used in this study. The first two vanes (Vanes 1 and 2) were

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42

Liu, Fu Chun, Jian Rong Zhang, and Dong Wang. "Influence of the Distribution of Dual Cascades on Double Vanes Based on the Solid-Liquid Two-Phase Flow." Applied Mechanics and Materials 741 (March 2015): 513–16. http://dx.doi.org/10.4028/www.scientific.net/amm.741.513.

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The relative positional relationship between the stay vanes and guide vanes is researched to analyze the impact on the hydraulic performance of the Turbine based on N-S equations and RNG k-ε turbulence model under the conditions of sandy water with the numerical simulation method. There are main five kinds of the relative positional relationship between the dual cascades is used to analyse the trends of the distribution about the pressure and velocity. The relative circumferential positions between the dual cascades have obviously effect on the flow verified. And the velocity vector and the pr

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Zhang, Hong Zhan, Xiao Jun Li, Zhen Yue Ma, and Kun Shan Xiang. "Research on Simulation Technique for Fixed Guide Vanes in Axial Symmetric Models of Spiral Case." Advanced Materials Research 671-674 (March 2013): 873–78. http://dx.doi.org/10.4028/www.scientific.net/amr.671-674.873.

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The axial symmetric model has been widely used in the research and design of spiral case structure in hydraulic power station due to its convenience, however, instead of a continuous entity, the fixed guide vanes are discretely distributed around the vertical axis of the unit, and there are some different opinions on the simulation techniques for the fixed guide vane in the existing research. Commonly used processing methods for fixed guide vanes in the spiral case axial symmetry model are summarized and two new simulation techniques on the basis of existing research are proposed. Static analy

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Eizeldin, Mohamed, and Ahmed Yasser. "Morphological changes of Cairo West power plant intake while using submerged vanes." IOP Conference Series: Earth and Environmental Science 1056, no. 1 (2022): 012047. http://dx.doi.org/10.1088/1755-1315/1056/1/012047.

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Abstract Lateral intake structures suffer from sediment deposition and instability of flow path which may have a negative influence on the efficiency of power plants that use river intakes as a primary source for their cooling system. This study aims to experiment the usage of submerged vanes as a mitigation method and determine their effectiveness in decreasing sediment deposition. A numerical model was constructed using DELFT3D of a reach that is located in the Nile River including the intake structure. Several scenarios were tested to optimise several parameters such as the usage of one or

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Azizipour, Mohamad, Farshid Amirsalari Meymani, and Mohammad Mahmoodian Shooshtari. "Enhancing scour protection in river bends: a novel slotted bank-attached vane." Water Supply 20, no. 6 (2020): 2175–84. http://dx.doi.org/10.2166/ws.2020.116.

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Abstract One of the most effective approaches for bank control erosion is using bank-attached vanes. In spite of the superiority of the bank-attached vanes to spur dikes, the vanes' tips are still vulnerable to local scour caused by flow–structure interaction. In this study, slotted bank-attached vanes are proposed to reduce local scour at the tip of the triangular submerged vane. For this, a rectangular slot is created parallel to the chord of the vane with an area of ten percent of the effective area of the vane surface. Two types of conventional vanes and slotted vanes were installed at dif

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Zhiwei, Guo, Wang Chihang, Qian Zhongdong, Luo Xianwu, and Xia Weipeng. "Suppression of hump characteristic for a pump-turbine using leading-edge protuberance." Proceedings of the Institution of Mechanical Engineers, Part A: Journal of Power and Energy 234, no. 2 (2019): 187–94. http://dx.doi.org/10.1177/0957650919854638.

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The application of wave guide vanes with bio-inspired leading-edge protuberances to the hump characteristic of a pump-turbine is examined in this study. Numerical simulation with a shear-stress transport turbulence model is used to calculate the three-dimensional flow in a pump-turbine in pumping mode. Three tubercle amplitudes of 0.02c, 0.04c, and 0.08c (c is chord length), and three spanwise wavenumbers (2/s, 4/s and 8/s, s is the length of span) for guide vanes are especially considered. The results obtained show that the simulated performances of original guide vanes are found to be in goo

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Liang, Quanwei, Wenzhe Kang, Lingjiu Zhou, and Zhengwei Wang. "Numerical Investigation of the Flow Regime in the Vanes and the Torsional Self-Excited Vibration of Guide Vane in the Pump Mode of a Reversible Pump-Turbine." Processes 10, no. 11 (2022): 2314. http://dx.doi.org/10.3390/pr10112314.

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Guide vanes (GVs) are installed between the runner and the stay vanes for flow guidance and discharge regulation in reversible pump-turbines. The unstable torsional self-excited vibration of the guide vane (GV) may occur when running at small guide vane opening angles during the transient operations involving pump flow. In addition, the double-stage radial vanes may induce complex flow in the vanes and influence the stability of torsional self-excited vibration of the guide vane. In this study, numerical simulations were conducted at small guide vane opening angles in pump mode for two differe

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Nakagawa, Koji, Hiroshi Hayami, and Yuichi Keimi. "Comparison of Two Diffusers in a Transonic Centrifugal Compressor." International Journal of Rotating Machinery 9, no. 4 (2003): 279–84. http://dx.doi.org/10.1155/s1023621x03000253.

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Flow mechanisms suppressing the flow separation in two diffusers, a low-solidity cascade diffuser and a vaned diffuser with additional small vanes near the inlet, were compared mainly by numerical simulation. As the superiority of the low-solidity cascade diffuser was expected, a series of experiments was conducted using a transonic centrifugal compressor with a maximum pressure ratio of 7. The performance of the compressor with the vaned diffuser was comparable to that of the low-solidity cascade diffuser only between the surge point and the design flowrate at a pressure ratio of 3.5. The max

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Kristama, Daniel, Antonius Ibi Weking, and Lie Jasa. "Studi Analisis Pengaruh Perubahan Posisi Nozzle Terhadap Pout Pada Prototipe PLTMH." Majalah Ilmiah Teknologi Elektro 17, no. 2 (2018): 251. http://dx.doi.org/10.24843/mite.2018.v17i02.p13.

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Renewable sources of energy by utilizing water resources, more specifically is PLTMH (Micro-Hydro power plants) to be an excellent choice for potential to be developed in order to overcome the scarcity of energy. For ease in learning about PLTMH then use PLTMH prototype by designing the nozzle position on the corner of 00, 150, 300, 450, 600 and 750 to measurements, using three types of turbine vanes, on the position of the nozzle at an angle of 600 produces round generator and turbine rotation. The position of the nozzle at an angle of 600, a model turbine vanes are recommended to be used is

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Wenhuan, Liu, and Xu Pinjing. "A Study of the Effect of Different Inlet Vanes on Cyclone Pressure Drop and Collection Efficiency." Journal of Computational and Theoretical Nanoscience 13, no. 10 (2016): 6769–73. http://dx.doi.org/10.1166/jctn.2016.5626.

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Experimental studies have been conducted on pressure drop and collection efficiency of a cyclone separator with different inlet vanes. The results indicated that all the inlet vanes reduce the cyclone pressure drop and also influence the collection efficiency in various degrees. Cyclone pressure drop decreases when dust concentration in the gas increases, and when an inlet vane is installed. 3#, 4# inlet vanes cause a higher pressure drop reduction, and a lower collection efficiency than without an inlet vane; Of all the inlet vanes, the effect of 2# on pressure drop reduction is in the second

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