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Journal articles on the topic 'Grid impeller'

Author: Grafiati

Published: 30 May 2022

Last updated: 31 July 2025

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1

Asuaje, Miguel, Farid Bakir, Smaïne Kouidri, Frank Kenyery, and Robert Rey. "Numerical Modelization of the Flow in Centrifugal Pump: Volute Influence in Velocity and Pressure Fields." International Journal of Rotating Machinery 2005, no. 3 (2005): 244–55. http://dx.doi.org/10.1155/ijrm.2005.244.

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A 3D-CFD simulation of the impeller and volute of a centrifugal pump has been performed using CFX codes. The pump has a specific speed of 32 (metric units) and an outside impeller diameter of 400 mm. First, a 3D flow simulation for the impeller with a structured grid is presented. A sensitivity analysis regarding grid quality and turbulence models were also performed. The final impeller model obtained was used for a 3D quasi-unsteady flow simulation of the impeller-volute stage. A procedure for designing the volute, the nonstructured grid generation in the volute, and the interface flow passag

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2

Wu, Wei Min, and Yuan Jun Dai. "Numerical Research on the Change Regularity of S Series Airfoil Tip Vortex." Applied Mechanics and Materials 401-403 (September 2013): 379–82. http://dx.doi.org/10.4028/www.scientific.net/amm.401-403.379.

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This paper take the impeller of S series airfoil for instance, in view of the complex flow field which is in the condition for the optimum attack angle of design wind velocity with tip vortex, presents a new generating strategy of grid based on controlling gradient method which takes the non-uniform tetrahedral grid with gradient gradual change in the near blade wall flow field. The transition layer grid which is in the development from body-fitted field to the middle of the domain having relatively high density of grid contrast with the far flow field can well capture the size and location of

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3

Abdullah, Bestoon, Vadim Varsegov, and Adolf Limansky. "CENTRIFUGAL COMPRESSOR HEAD CHARACTERISTIC OF A MICRO TURBOJET ENGINE BASED ON NUMERICAL SIMULATION." Perm National Research Polytechnic University Aerospace Engineering Bulletin, no. 62 (2020): 5–11. http://dx.doi.org/10.15593/2224-9982/2020.62.01.

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Shown the possibility of using the standard ANSYS CFX hydrodynamic software package for calculating the gasdynamic characteristics of the centrifugal compressor impeller of micro turbojet engines with different options for profiling blades which based on physical and numerical modeling. Presented a methodology for designing the impeller of a centrifugal compressor based on solving the inverse problem of gas dynamics. As a result of a numerical study, the head coefficient of various forms of the impeller was obtained and presented the dependences of the head coefficient and efficiency on the bl

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4

Miner, Steven M. "3-D Viscous Flow Analysis of a Mixed Flow Pump Impeller." International Journal of Rotating Machinery 7, no. 1 (2001): 53–63. http://dx.doi.org/10.1155/s1023621x01000057.

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This paper presents the results of a study using a coarse grid to analyze the flow in the impeller of a mixed flow pump. A commercial computational fluid dynamics code (FLOTRAN) is used to solve the 3-D Reynolds Averaged Navier Stokes equations in a rotating cylindrical coordinate system. The standardk-εturbulence model is used. The mesh for this study uses 26,000 nodes and the model is run on a SPARCstation 20. This is in contrast to typical analyses using in excess of 100,000 nodes that are run on a super computer platform. The smaller mesh size has advantages in the design environment. Stag

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5

Ji, Hou, Zhang Hong, Ren Xinhua, Zhang Jia, and Peng Chen. "Simulation and study of the flow field in a kettle-type reactor for ethylene polymerization." Journal of Physics: Conference Series 2842, no. 1 (2024): 012050. http://dx.doi.org/10.1088/1742-6596/2842/1/012050.

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Abstract Addressing the complexities inherent in the polymerization process for solution method polyethylene production, particularly the challenges in describing the turbulent three-dimensional flow field within the reactor and the precise design of reactor structural parameters, this research leverages computational fluid dynamics (CFD) methods integrated with polymerization reaction kinetics equations. We have formulated User-Defined Functions (UDFs) for a quantitative representation of the polymerization process. Employing the Realizable k-epsilon turbulence model and Sliding Grid (SG) tec

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6

Barza, Tesfaye, and G. Lakshmikanth. "Flow Simulation And Performance Analysis Of Centrifugal Compressor Using Cfd_Tool." Journal of University of Shanghai for Science and Technology 23, no. 11 (2021): 693–703. http://dx.doi.org/10.51201/jusst/21/11941.

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This paper is concerned the flow simulation and performance analysis of the Centrifugal Compressor Using CFD – Tool. The complex internal flow of centrifugal compressor can be well analyzed, and the unique design system needs to be developed. It should be early to use the interface and also flexible for input and output. A 3-D flow simulation of turbulent – fluid flow is presented to visualize the flow pattern in-terms of velocity, streamline and pressure distribution on the blade surface are graphically interpreted. The standard K- e turbulence model and the simple model algorithm were chosen

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7

A. Wahab, Abdul Kareem, Khudheyer S. Mushatet, and Wissam H. Ajeel. "Experimental and Computational Investigation of Dynamics Effects in a High Speed Centrifugal Pump." University of Thi-Qar Journal for Engineering Sciences 4, no. 1 (2013): 25–46. http://dx.doi.org/10.31663/utjes.v4i1.170.

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Experimental and numerical investigation of a high speed centrifugal pump has been carried out. In experimental work, a test rig which includes a centrifugal pump, fast response piezoelectric pressure transducers, Rota meter flow and measurement instrumentations is designed and constructed. Two impellers having different outlet diameters were examined for the same volute. A data acquisition system (hardware) and its software (Visual Basic language) have been developed to analyze the pressure transducer signal in order to obtain the pressure fluctuations. The governing partial differential equa

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8

Honda, Hironori, Tadashi Kanzaka, Nobuhito Oka, Tom Verstraete, Arnaud Châtel, and Lasse Müller. "Performance improvement of centrifugal compressors for automotive turbochargers using adjoint method." Journal of Physics: Conference Series 2217, no. 1 (2022): 012010. http://dx.doi.org/10.1088/1742-6596/2217/1/012010.

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Abstract A sensitivity calculation using adjoint method has a feature of low calculation cost because sensitivity information of all computational grid points can be calculated by only one numerical simulation. From this feature, it has been utilized as a calculation method of sensitivity information for a gradient-based optimization and this optimization procedure with adjoint method can be one of suitable ways for centrifugal compressor impeller which has a lot of design parameters such as meridional shape, blade angle and thickness. During the gradient-based optimization, mesh morphing, whi

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9

Lou, Yuan, Guangjie Peng, and Hao Chang. "Numerical simulation and thrust performance optimization of water jet thruster." Journal of Physics: Conference Series 2707, no. 1 (2024): 012113. http://dx.doi.org/10.1088/1742-6596/2707/1/012113.

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Abstract With the increasing use of water jet thrusters on ships, the demand for increasing their thrust performance and efficiency is also increasing. The impeller, as the core power component, is the key to the thrust of the water jet thruster. Therefore, to obtain a more energy-saving, low-carbon, and higher-thrust water jet thruster, this paper conducts an in-depth study on the impeller of the water jet thruster. The hexahedral grid is used to divide the internal flow field of the water jet thruster into structured grids, and the RANS equation and k-ε turbulence model are used to simulate

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10

Wang, Yesong, Zixuan Sun, Jisheng Liu, Manxian Liu, and Yong Zhou. "Optimization design of centrifugal impeller based on Bezier surface and FFD space grid parameterization." PLOS ONE 19, no. 11 (2024): e0310792. http://dx.doi.org/10.1371/journal.pone.0310792.

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To enhance the aerodynamic performance of centrifugal impellers, this study presents an advanced optimization design methodology. This methodology addresses the challenges associated with numerous design variables, inflexible configurations, and low optimization efficiency. We propose two distinct spline function parameterization techniques: a global mapping model for Bezier surfaces and a local mapping model for Free-Form Deformation (FFD) control bodies. We investigate the impact of these parameterization methods on blade geometry configuration and aerodynamic performance. By integrating the

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11

Kim, Kyu Han, and Joni Cahyono. "Numerical Study on Impeller Performance of Mini Hydro Turbine." Applied Mechanics and Materials 772 (July 2015): 552–55. http://dx.doi.org/10.4028/www.scientific.net/amm.772.552.

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The aim of this paper is to numerically explore the feasibility of designing a Mini-Hydro turbine. The interest for this kind of horizontal axis turbine relies on its versatility. In the present study, the numerical solution of the discredited three-dimensional, incompressible Navier-Stokes equations over an unstructured grid is accomplished with an ANSYS program. In this study, a mini hydro turbine (3kW) has been considered for utilization of horizontal axis impeller. The turbine performance and flow behavior have been evaluated by means of numerical simulations. Moreover, the performance of

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12

Ismail, Olawale Saheed, Adetokunbo Andrew Awonusi, and Rahman Akinoso. "Isothermal Air Flow Investigation in Industrial Baking Oven of Different Impeller Locations using Computational Fluid Dynamics (CFD) Approach." Journal of Engineering Science 17, no. 2 (2021): 73–91. http://dx.doi.org/10.21315/jes2021.17.2.5.

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Computational fluid dynamics (CFD) modelling was performed on a forced convection oven to investigate the isothermal airflow. Three oven design configurations based on their impeller location (back, side, and top wall) were compared with respect to their Turbulence Kinetic Energy (TKE) profile to determine the optimal configuration design for quick uniform baking. The air velocity was estimated from both experimental and modelling approaches at specific points in an oven with the back walled impeller. The CFD model was validated resulting in a calculation error of 30.34% of actual velocity whi

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13

Балалаев, Антон Валерьевич, Екатерина Викторовна Балалаева та Юрий Юрьевич Терещенко. "Моделювання течії в дворядному вентиляторі турбореактивного двоконтурного двигуна". Aerospace technic and technology, № 4sup1 (27 серпня 2021): 19–24. http://dx.doi.org/10.32620/aktt.2021.4sup1.03.

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Modern trends in the global aircraft industry are prompting aircraft engine engineers to create and develop various methods to improve the aerodynamic characteristics of turbomachines. The urgent need to improve the efficiency of new generation engines leads to a rapid increase in the bypass ratio of engines, which requires the development of fans with large diametrical dimensions and high aerodynamic perfection. Boundary layer control in turbomachines using tandem blade rows is one of the most promising ways to improve the aerodynamic characteristics of aircraft engine fans with a high bypass

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14

Kim, Youn-Sung, Man-Woong Heo, Hyeon-Seok Shim, Bong-Soo Lee, Dong-Hwan Kim, and Kwang-Yong Kim. "Hydrodynamic Optimization for Design of a Submersible Axial-Flow Pump with a Swept Impeller." Energies 13, no. 12 (2020): 3053. http://dx.doi.org/10.3390/en13123053.

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Submersible pumps are now in high demand due to the sporadic occurrence of recent torrential rains. The current study was carried out to investigate the hydraulic characteristics of a submersible axial-flow pump with a swept impeller and to optimize the impeller and diffuser shapes of the pump to enhance the hydraulic performance. Three-dimensional Reynolds-averaged Navier–Stokes equations were solved with the shear stress transport turbulence model. The governing equations were discretized using the finite volume method, and unstructured tetrahedral and hexahedral meshes were used in the grid

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15

Шахбанов, Ризван, Rizvan Shakhbanov, Леонид Савин, and Leonid Savin. "SIMULATION OF HYDRO-MECHANICAL PROCESSES IN CENTRIFUGAL PUMPS." Bulletin of Bryansk state technical university 2016, no. 1 (2016): 100–105. http://dx.doi.org/10.12737/18271.

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The peculiarities in current and kinematics of hydromechanical processes in centrifugal (rotary) pumps are considered. The theoretical description and graphical presentation of velocity profiles in an impeller are shown. A complex current in an impeller is described with the aid of a continuity equation and Navier-Stokes equation for rotating coordinates. A nonviscous character of fluid flow in the setting of an im-peller is taken into account by means of averaging of the equation of motion for that purpose the equation of a turbulence model is introduced in addition. The scheme of the digitiz

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16

Ahmad Faiq Baba, Nor Afzanizam Samiran, Razlin Abd Rashid, et al. "Effect of Impeller’s Blade Number on The Performance of Mixing Flow in Stirred Tank using CFD Simulation Method." CFD Letters 14, no. 5 (2022): 33–42. http://dx.doi.org/10.37934/cfdl.14.5.3342.

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The component of an impeller in stirred tank plays an important role in the mixing process for a wide range of industries. The present study conducted the analysis of impeller design specifically on the number of blades to investigate the flow performance in the stirred tank. The analysis was also performed to identify the location of the particle flow dead zone at the bottom of the tank. The grid development and fluid flow study were accomplished using the CFD simulation method via the Ansys Fluent software package. The impeller design with the arrangement of 3,4 and 5 blades number was invol

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17

Yang, Fengling, Haiyao Sun, and Cuixun Zhang. "Gas‐Liquid Mixing in a Grid‐Disc Impeller Stirred Tank." Chemical Engineering & Technology 43, no. 7 (2020): 1297–307. http://dx.doi.org/10.1002/ceat.201900651.

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18

Chomiuk, Bartłomiej, and Janusz Skrzypacz. "Analysis of the influence of a stator type modification on the performance of a pump with a hole impeller." Open Engineering 9, no. 1 (2019): 218–28. http://dx.doi.org/10.1515/eng-2019-0029.

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AbstractThe article presents the results of numerical analyses and experimental research of the influence of various types of stators on a liquid flow through a centrifugal pump with a hole impeller. It is a continuation of authors research of cooperation pump stators with alternative types of impellers which work in ultra low specific speed. Hole impellers have become a significant alternative to classical ones in a range of extremely low specific speed nq<10. The aim of the research is to verify the quality as well as quantity of computer modeling results, and to estimate accuracy by exam

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19

Kim, Kyungmin, Yosep Kim, Youngkyu Ju, Insu Son, and Naksoo Kim. "CNN-Based Ti-6242 Impeller Forging Process Design for Uniform Strain Distribution." Applied Sciences 13, no. 14 (2023): 8272. http://dx.doi.org/10.3390/app13148272.

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In this study, we propose a systematic process design method using a convolutional neural network (CNN) for the uniform strain distribution of a Ti-6242 impeller during forging. A convolutional neural network (CNN) is a machine learning algorithm optimized for processing grid-like data, such as images, by identifying patterns within the data. To achieve the design goal with a simple process, we propose a methodological process in which the initial billet passes through three steps: upsetting, preform forging, and target impeller forging. We used the CNN model in the upsetting and preforming st

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20

Liu, Jian Hua, and Ming Yi Zhu. "Simulation Study on Attrition to Centrifugal Sewerage Pump." Key Engineering Materials 474-476 (April 2011): 1107–10. http://dx.doi.org/10.4028/www.scientific.net/kem.474-476.1107.

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By Means of Fluent 6.3，the paper simulated the solid-liquid two-phase flow to a type of centrifugal sewerage pump under different sand size and contain arenaceous concentration conditions, using Eulerian Mixture Model, adopting SIMPLE algorithm, k-ε-Ap turbulence model and partitioning non-structure hex grid in the area of flow passage in the pump. The paper analyzed wear characteristics in different parts of centrifugal sewage pump impeller and put forward some means to decrease attrition for impeller. The results can be as theoretical reference for the optimization design of the centrifugal

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21

Li, Jia, Hua Cong Li, Jiang Feng Fu, and Shu Hong Wang. "Research on New Strucural Aero Fuel Centrifugal Pump Design." Applied Mechanics and Materials 568-570 (June 2014): 1801–7. http://dx.doi.org/10.4028/www.scientific.net/amm.568-570.1801.

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A inducer and impeller combination aero fuel centrifugal pump design method was given. Based on empirical coefficient method the preliminary structural parameters of the combination Centrifugal pump were designed firstly. Then the Centrifugal pump Hybrid Grid model was built with muti-block structure and octree style.The final structure parameters were obtained by CFD numerical simulation optimization. Finally, the flow field of combination Centrifugal pump was analyzed and compared simulation datas with test datas by making the test samples.The relative error of the design point doesn’t excee

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22

Wang, Y., and S. Komori. "Simulation of the subsonic flow in a high-speed centrifugal compressor impeller by the pressure-based method." Proceedings of the Institution of Mechanical Engineers, Part A: Journal of Power and Energy 212, no. 4 (1998): 269–87. http://dx.doi.org/10.1243/0957650981536790.

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A pressure-based finite volume procedure developed previously for incompressible flows is extended to predict the three-dimensional compressible flow within a centrifugal impeller. In this procedure, the general curvilinear coordinate system is used and the collocated grid arrangement is adopted. Mass-averaging is used to close the instantaneous Navier-Stokes equations. The covariant velocity components are used as the main variables for the momentum equations, making the pressure-velocity coupling easier. The procedure is successfully applied to predict various compressible flows from subsoni

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23

Li, Yi. "3-D BODY-FITTED GRID GENERATION OF NON-CLOGGING PUMP IMPELLER." Chinese Journal of Mechanical Engineering 38, no. 02 (2002): 104. http://dx.doi.org/10.3901/jme.2002.02.104.

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24

Gao, Mengxing, and Li Cheng. "Study on Cascade Density of the Impeller Based on Response Surface Analysis." Water 15, no. 23 (2023): 4101. http://dx.doi.org/10.3390/w15234101.

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In order to improve the cavitation performance of hydraulic machinery in the design stage, the response surface analysis method is used to study the influence of cascade density on the hydraulic characteristics and cavitation characteristics of a three-dimensional rotating hydrofoil. For this method, an axial flow impeller with a specific speed of 750 is selected as the experimental object. Nine groups of three-dimensional rotating hydrofoils with different cascade densities were designed by the D-optimal quadratic sampling method. The impeller and guide vane were structured and meshed by Turb

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25

Wechsler, K., M. Breuer, and F. Durst. "Steady and Unsteady Computations of Turbulent Flows Induced by a 4/45° Pitched-Blade Impeller." Journal of Fluids Engineering 121, no. 2 (1999): 318–29. http://dx.doi.org/10.1115/1.2822210.

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The present paper summarizes steady and unsteady computations of turbulent flow induced by a pitched-blade turbine (four blades, 45° inclined) in a baffled stirred tank. Mean flow and turbulence characteristics were determined by solving the Reynolds averaged Navier-Stokes equations together with a standard k-ε turbulence model. The round vessel had a diameter of T = 152 mm. The turbine of diameter T/3 was located at a clearance of T/3. The Reynolds number (Re) of the experimental investigation was 7280, and computations were performed at Re = 7280 and Re = 29,000. Techniques of high-performan

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26

Goto, Akira, Motohiko Nohmi, Takaki Sakurai, and Yoshiyasu Sogawa. "Hydrodynamic Design System for Pumps Based on 3-D CAD, CFD, and Inverse Design Method." Journal of Fluids Engineering 124, no. 2 (2002): 329–35. http://dx.doi.org/10.1115/1.1471362.

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A computer-aided design system has been developed for hydraulic parts of pumps including impellers, bowl diffusers, volutes, and vaned return channels. The key technologies include three-dimensional (3-D) CAD modeling, automatic grid generation, CFD analysis, and a 3-D inverse design method. The design system is directly connected to a rapid prototyping production system and a flexible manufacturing system composed of a group of DNC machines. The use of this novel design system leads to a drastic reduction of the development time of pumps having high performance, high reliability, and innovati

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Liu, Xiang Ling, Meng Xiang Liu, and Jin Ke Gong. "The Finite Element Analysis of Gasoline Engine Turbocharger Key Parts." Applied Mechanics and Materials 433-435 (October 2013): 2151–55. http://dx.doi.org/10.4028/www.scientific.net/amm.433-435.2151.

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A geometric model and finite element grid model of JQ40A gasoline engine turbocharger were set up based on the CFD software NUMECA. And the stress, deformation and vibration modal analysis on turbocharger’s compressor impeller, turbine and integrated turbine box was carried out by software ANSYS. The result shows that thin blade impeller design, weight reduction design of the turbine is beneficial to reducing the maximum structural stress, deformation and rotation frequency. The integrated design of the exhaust manifold and the turbine housing is helpful to reducing the flow resistance and the

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28

Petit, Olivier, and Håkan Nilsson. "Numerical Investigations of Unsteady Flow in a Centrifugal Pump with a Vaned Diffuser." International Journal of Rotating Machinery 2013 (2013): 1–14. http://dx.doi.org/10.1155/2013/961580.

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Computational fluid dynamics (CFD) analyses were made to study the unsteady three-dimensional turbulence in the ERCOFTAC centrifugal pump test case. The simulations were carried out using the OpenFOAM Open Source CFD software. The test case consists of an unshrouded centrifugal impeller with seven blades and a radial vaned diffuser with 12 vanes. A large number of measurements are available in the radial gap between the impeller and the diffuse, making this case ideal for validating numerical methods. Results of steady and unsteady calculations of the flow in the pump are compared with the exp

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Olaore, K. O., D. B. Gwadangwaji, and M. A. Bayawa. "UTILIZING AN OPEN IMPELLER OF A CENTRIFUGAL PUMP IN REVERSE MODE TO GENERATE ELECTRICITY." Journal of Science and Technology 30, no. 5 (2025): 9–16. https://doi.org/10.20428/jst.v30i5.2610.

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The increasing demand for electricity, particularly in remote and off-grid regions, has highlighted the need for cost-effective and environmentally sustainable energy solutions. This study investigates the feasibility of utilizing a centrifugal pump, operated in reverse mode with an open impeller, as a turbine for micro-hydro power generation. Small hydropower (SHP) systems, characterized by their affordability and minimal ecological impact, represent a promising alternative to large-scale energy projects. Experimental tests were conducted to evaluate the operational parameters of the open imp

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Flathers, M. B., and G. E. Bache´. "Aerodynamically Induced Radial Forces in a Centrifugal Gas Compressor: Part 2—Computational Investigation." Journal of Engineering for Gas Turbines and Power 121, no. 4 (1999): 725–34. http://dx.doi.org/10.1115/1.2818533.

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Radial loads and direction of a centrifugal gas compressor containing a high specific speed mixed flow impeller and a single tongue volute were determined both experimentally and computationally at both design and off-design conditions. The experimental methodology was developed in conjunction with a traditional ASME PTC-10 closed-loop test to determine radial load and direction. The experimental study is detailed in Part 1 of this paper (Moore and Flathers, 1998). The computational method employs a commercially available, fully three-dimensional viscous code to analyze the impeller and the vo

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31

Peng, Cancan, Xiaodong Zhang, Yongqiang Chen, Yan Gong, Hedong Li, and Shaoxiong Huang. "A Method for the Integrated Optimal Design of Multiphase Pump Based on the Sparse Grid Model." Processes 10, no. 7 (2022): 1317. http://dx.doi.org/10.3390/pr10071317.

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Multiphase pumps are used as an important tool for natural gas hydrate extraction owing to their excellent gas–liquid mixing and transport properties. This paper proposes an adaptive response surface-based integrated optimization design method. A model pump is designed based on the axial flow pump design theory. The model pump is numerically simulated and analyzed to obtain its performance parameters. Then the structural and performance parameters of the pump are parameterized to establish a closed-loop input–output system. Based on this closed-loop system, a sensitivity analysis is performed

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Ye, Weixiang, Xianwu Luo, Renfang Huang, Zhiwu Jiang, Xiaojun Li, and Zuchao Zhu. "Investigation of flow instability characteristics in a low specific speed centrifugal pump using a modified partially averaged Navier–Stokes model." Proceedings of the Institution of Mechanical Engineers, Part A: Journal of Power and Energy 233, no. 7 (2019): 834–48. http://dx.doi.org/10.1177/0957650919830188.

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In this study, a modified partially averaged Navier–Stokes (MPANS) model is applied to investigate the flow instability characteristics in a low specific centrifugal pump. In MPANS model, the unresolved-to-total ratio of kinetic energy fk is determined according to the local grid size and turbulence length scale. The numerical results by MPANS model are compared with that simulated by SST k-ω model and the available experimental data. It is noted that MPANS model shows better performance for investigating the unstable flow in the current pump under part-load operation conditions. The time-aver

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33

Yang, Feng Ling, Shen Jie Zhou, and Cui Xun Zhang. "Turbulent flow and mixing performance of a novel six-blade grid disc impeller." Korean Journal of Chemical Engineering 32, no. 5 (2015): 816–25. http://dx.doi.org/10.1007/s11814-014-0255-4.

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Zhang, Wenwu, Zhiyi Yu, and Yongjiang Li. "Analysis of flow and phase interaction characteristics in a gas-liquid two-phase pump." Oil & Gas Science and Technology – Revue d’IFP Energies nouvelles 73 (2018): 69. http://dx.doi.org/10.2516/ogst/2018072.

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To analyze the characteristics of internal flow and phase interaction in a gas-liquid two-phase pump, the influence of Inlet Gas Void Fraction (IGVF), discharge coefficient, and medium viscosity were investigated using medium combinations of air-water and air-crude. Simulations were performed using ANSYS_CFX at different IGVFs and various values of discharge coefficient. Structured grid for the full flow passage was generated using ICEM_CFD and TurboGrid. Under conditions of IGVF = 0% (pure water) and IGVF = 15%, the reliability of numerical method was proved by means of the comparison with th

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Pei, Ji, Wenjie Wang, Shouqi Yuan, and Jieyun Mao. "Numerical Investigation of Periodically Unsteady Pressure Field in a High Power Centrifugal Diffuser Pump." Advances in Mechanical Engineering 6 (January 1, 2014): 159380. http://dx.doi.org/10.1155/2014/159380.

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Pressure fluctuations are the main factors that can give rise to reliability problems in centrifugal pumps. The periodically unsteady pressure characteristics caused by rotor-stator interaction have been investigated by CFD calculation in a residual heat removal pump. Side chamber flow effect is also considered for the simulation to accurately predict the flow in whole flow passage. The pressure fluctuation results in time and frequency domains were considered for several typical monitoring points in impeller and diffuser channels. In addition, the pressure fluctuation intensity coefficient (P

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Chen, Minjia, Xingqi Luo, Jianjun Feng, and Siqin Lv. "The influence of guide vane opening on internal cavitation of Francis turbine." Journal of Physics: Conference Series 2752, no. 1 (2024): 012031. http://dx.doi.org/10.1088/1742-6596/2752/1/012031.

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Abstract In response to the theme of national multi energy complementary power grid construction, hydropower stations need to frequently change the opening of active guide vanes. Operation deviates from the rated working condition. And output is adjusted to meet the flexible power demand of users. Cavitation phenomenon as the biggest problem restricting the eccentric operation of Francis turbine. Easily induce cavitation damage to the flow passage components of the unit and shorten the service life of the unit. Therefore, there is a good engineering research background for the cavitation chara

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Liu, Cong, Xiaoyi Wang, Xiaofeng Yu, Yuhua Zhang, Zhizhen Qiu, and Xiangrong Xu. "Power Coefficient Analysis of Double-blade Half-rotating Impeller Tidal Turbine Operating at Yaw." E3S Web of Conferences 242 (2021): 03008. http://dx.doi.org/10.1051/e3sconf/202124203008.

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The double-blade half-rotating impeller tidal turbine (DHITT) is a new type of vertical shaft tidal current turbine with lift and resistance performance. The power coefficient of the DHITT is affected by the flow direction. In order to research the power coefficient (CP) of the DHITT under different flow direction, the optimal attack flow angle of a half-impeller turbine was explored, and the fluctuation of power coefficient of the DHITT operating at yaw was analyzed based on the optimal attack flow angle. The unsteady flow of the turbine was simulated by overlapping grid technique, and the fl

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Yang, Haixia, Qilian He, Huili Bi, et al. "Head-Cover vibration investigation of a Prototype Reversible Pump-Turbine Unit during Start-up in Pump mode. Part I: Fluid dynamic analysis." IOP Conference Series: Earth and Environmental Science 1037, no. 1 (2022): 012055. http://dx.doi.org/10.1088/1755-1315/1037/1/012055.

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Abstract Reversible pump-turbine units of pumped storage power stations can generate power in turbine mode and store electric energy in pump mode for load balancing of the electric power grid. During the start-up transient process in pump mode of a reversible pump-turbine, the flow pattern and the pressure distribution in the flow channel change dramatically with the increasing opening angle of guide vanes. The unsteady pressure of the flow passing channel can cause severe vibration on the head-cover, bottom ring, and other stationary structures around the impeller. In this paper, a coupled 1D

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Tsui, Yeng-Yung, Jian-Ren Chou, and Yu-Chang Hu. "Blade Angle Effects on the Flow in a Tank Agitated by the Pitched-Blade Turbine." Journal of Fluids Engineering 128, no. 4 (2006): 774–82. http://dx.doi.org/10.1115/1.2201636.

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This paper presents a study of the influence of the blade angle on the flow in a tank stirred by the pitched-blade turbine. The flow induced by the pitched-blade turbine is usually described as an axial type with a principal ring vortex dominating the flow structure. However, it is known that as the blade becomes vertical, i.e., as the pitch angle of the blade becomes 90deg, the flow is of the radial type, with two main ring vortices occupying the tank. Thus, a transition of flow type must take place when the blade angle is varied. This motivates the current study. A computational method was d

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Hu, Bingbing, and Bing Li. "Blade Crack Detection of Centrifugal Fan Using Adaptive Stochastic Resonance." Shock and Vibration 2015 (2015): 1–12. http://dx.doi.org/10.1155/2015/954932.

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Centrifugal fans are widely used in various industries as a kind of turbo machinery. Among the components of the centrifugal fan, the impeller is a key part because it is used to transform kinetic energy into pressure energy. Crack in impeller’s blades is one of the serious hidden dangers. It is important to detect the cracks in the blades as early as possible. Based on blade vibration signals, this research applies an adaptive stochastic resonance (ASR) method to diagnose crack fault in centrifugal fan. The ASR method, which can utilize the optimization ability of the grid search method and a

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Luo, Can, Shuaihao Lei, Chuan Wang, et al. "Investigation of Complex Characteristics of Waterjet Propulsion Device with Intake Grid." Shock and Vibration 2021 (October 23, 2021): 1–22. http://dx.doi.org/10.1155/2021/6688635.

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The intake grid is always installed technically to protect the impeller at the entrance of the waterjet propulsion device’s inlet duct affecting its performance. Therefore, this study discussed the complex features of the circular, rectangular, and streamlined intake grid. Consistent geometry size of the intake grid mentioned above is to be maintained to guarantee the identical flow capacity at the entrance of inlet duct. Using experimental and simulated method, the outcomes are drawn as below. Rather than the circular and rectangular intake grid, the streamlined intake grid can improve the hy

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Lee, S.-M., and C.-M. Jang. "Development of the microbubble pump having ‘S-shape’ impeller using experimental and numerical analysis." Journal of Physics: Conference Series 2217, no. 1 (2022): 012004. http://dx.doi.org/10.1088/1742-6596/2217/1/012004.

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Abstract Microbubble pumps for water treatment can be used in a variety of fields, including wastewater treatment of semiconductor factories, sewage treatment, and aquaculture. In this study, a microbubble pump, with the ‘S-shape’ impeller, for sewage treatment has been developed in two steps. In the first step, a numerical design optimization was performed to develop a small-scaled microbubble pump. In the second step, a microbubble pump with a capacity that can be used in an actual water treatment facility has been developed through the scale-up process of a small-scaled optimum design of mi

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Vodka, Oleksii, Yuliia Viazovychenko, Oleksiy Larin, and Kseniia Potopalska. "Computer modeling of the stress state and reliability assessment of bolted connections of the rotor and runner of Kaplan turbines." Bulletin of the National Technical University «KhPI» Series: Dynamics and Strength of Machines, no. 2 (December 31, 2022): 68–74. http://dx.doi.org/10.20998/2078-9130.2022.2.271065.

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Ensuring the trouble-free operation of hydroelectric power stations is an important element of the stability of the power grid. Hydraulic turbines are often used to regulate daily fluctuations in electricity consumption. It is the start/stop modes of the hydraulic unit that are the most dangerous and lead to the highest levels of mechanical stress. Therefore, the work is devoted to the development of detailed three-dimensional models for assessing the stress state of bolted connections of the impeller, and on their basis determining the stress state in different operating modes of the hydrauli

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Wang, Zhewen, Jiejun Li, Duohua Hou, Yulan Qiao, and Maojing Wu. "Research and application of wide and efficient hydraulic design in centrifugal pump." Journal of Physics: Conference Series 2707, no. 1 (2024): 012042. http://dx.doi.org/10.1088/1742-6596/2707/1/012042.

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Abstract Through the analysis of the wide and efficient mechanism of centrifugal pump, this paper finds that the shape of the blade inlet angle to the outlet angle distribution line of the centrifugal pump impeller within the blade wrapping angle is the key factor determining the width and efficiency. Two sets of blade thickening laws are adopted, namely the equal thickness type and the NACA1933 air-foil. Tests have shown that the hill-type is superior Linear scheme, NACA1933 air-foil blades are superior to equal-thickness blades. The hill-type solution achieves the performance indicators of w

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Zhou, Ling, Wei Dong Shi, and Wei Gang Lu. "Orthogonal Test Design and Numerical Simulation of 100QJ10 Type Deep-Well Pump." Applied Mechanics and Materials 110-116 (October 2011): 2590–95. http://dx.doi.org/10.4028/www.scientific.net/amm.110-116.2590.

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In this paper in order to develop high efficiency and high head deep-well pump, a L9 (34) orthogonal experiment was performed with four factors and three values including outlet angle, outlet width, the outside diameter of impeller back shroud, etc. 9 impellers were designed. The whole flow field of new-type two-stage deep-well pump at the operating point for design was simulated by FLUENT 6.2 using the standard model, SIMPLEC algorithm, second-order upwind scheme to solve, and analyze the independent of the number of the grid. 9 groups of the efficiency and head in design scheme were obtained

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Awasthi, Garima. "Flow Analysis of Centrifugal Compressor using ANSYS." International Journal for Research in Applied Science and Engineering Technology 12, no. 7 (2024): 1447–55. http://dx.doi.org/10.22214/ijraset.2024.63784.

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Abstract: The aerodynamic and structural designs of the impeller are vital to the functioning of the entire compressor stage in centrifugal compressors. In contrast to previous years, there has been a greater demand for industrial centrifugal compressors to operate with greater efficiency and operational range. Although the efficiency of low-pressure-ratio centrifugal compressors has nearly achieved its maximum, intermediate and high-pressure ratio machines still lag behind the state-of-the-art in terms of efficiency. Maintaining maximum efficiency while extending the working range is a challe

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Kriukov, Aleksei Alekseevich. "The relationship between the circumferential velocity and energy losses in the flow part of the inflow turbine with partial blading of the runner." Vestnik of Astrakhan State Technical University. Series: Marine engineering and technologies 2024, no. 2 (2024): 57–64. http://dx.doi.org/10.24143/2073-1574-2024-2-57-64.

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Low-consumption turbomachines are devices that play an important role in the drive of various units in the field of shipbuilding, aircraft engineering and other branches of heavy engineering. They have some advantages over a high-average power turbine. The largest number of low-consumption turbomachines are made partial, i.e. with partial intake. The principle of a turbine with partial flapping of the impeller is considered as one of the types of partial turbomachines. The influence of the main velocity characteristic of the turbine stage on the loss of kinetic energy in the stage is investiga

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Li, Chenhao, Xingqi Luo, Jianjun Feng, Guojun Zhu, and Yangang Xue. "Effects of Gas-Volume Fractions on the External Characteristics and Pressure Fluctuation of a Multistage Mixed-Transport Pump." Applied Sciences 10, no. 2 (2020): 582. http://dx.doi.org/10.3390/app10020582.

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In the petroleum industry, multiphase transport pumps are a crucial technology for petroleum extraction. Therefore, the pressure fluctuation and internal-flow characteristics of multiphase transport pumps with different inlet-gas-volume fractions (IGVFs) have become an important research topic. Studying the pressure fluctuation and its effects on the performance of mixed-transport pumps under different IGVFs is significant for improving the running stability of pumps. In this work, steady and transient flow with different IGVFs was solved using the Navier–Stokes equation applied to a structure

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Reese, Hauke, Chisachi Kato, and Thomas H. Carolus. "Large Eddy Simulation of Acoustical Sources in a Low Pressure Axial-Flow Fan Encountering Highly Turbulent Inflow." Journal of Fluids Engineering 129, no. 3 (2006): 263–72. http://dx.doi.org/10.1115/1.2427077.

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A large eddy simulation (LES) was applied to predict the unsteady flow in a low-speed axial-flow fan assembly subjected to a highly “turbulent” inflow that is generated by a turbulence grid placed upstream of the impeller. The dynamic Smagorinsky model (DSM) was used as the subgrid scale (SGS) model. A streamwise-upwind finite element method (FEM) with second-order accuracy in both time and space was applied as the discretization method together with a multi-frame of reference dynamic overset grid in order to take into account the effects of the blade-wake interactions. Based on a simple algeb

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Racca, Alberto, Tom Verstraete, and Lorenzo Casalino. "Radial Turbine Thermo-Mechanical Stress Optimization by Multidisciplinary Discrete Adjoint Method." International Journal of Turbomachinery, Propulsion and Power 5, no. 4 (2020): 30. http://dx.doi.org/10.3390/ijtpp5040030.

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This paper addresses the problem of the design optimization of turbomachinery components under thermo-mechanical constraints, with focus on a radial turbine impeller for turbocharger applications. Typically, turbine components operate at high temperatures and are exposed to important thermal gradients, leading to thermal stresses. Dealing with such structural requirements necessitates the optimization algorithms to operate a coupling between fluid and structural solvers that is computationally intensive. To reduce the cost during the optimization, a novel multiphysics gradient-based approach i

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