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A CFD Investigation of a 2D Balanced Vane Pump Focusing on Leakage Flows and Multiphase Flow Characteristics

Author

Listed:
  • Thomas Lobsinger

    (Robert Bosch Automotive Steering GmbH, Richard-Bullinger-Straße 77, 73527 Schwaebisch Gmuend, Germany)

  • Timm Hieronymus

    (Robert Bosch Automotive Steering GmbH, Richard-Bullinger-Straße 77, 73527 Schwaebisch Gmuend, Germany)

  • Gunther Brenner

    (Institute of Applied Mechanics, Clausthal University of Technology, Adolph-Roemer-Straße 2A, 38678 Clausthal-Zellerfeld, Germany)

Abstract

Vane pumps are often applied in automatic transmission systems of vehicles. Future applications require the oil pumps to be more efficient and to be able to handle multiphase flow pumping situations to a certain extend. To fulfill these requirements, efficient development tools are needed. Therefore, a less demanding computational 2D model of a fixed-type balanced vane pump was derived and numerically analyzed with the commercial computational fluid dynamics (CFD) software ANSYS CFX. The meshing of the rotating parts was done with TwinMesh, using a moving mesh approach. At first, a mesh convergence study was performed. It was shown that the resolution of the radial clearances in particular had a significant influence on the predicted leakages and the volumetric efficiency. The leakage was further investigated concerning the dependence on rotational speed and delivery pressure. In the next step, multiphase flows were considered. In a first setup, vapor cavitation was analyzed and the influence of the alignment of the suction ports on its onset was derived. In a second setup, the influence of different inlet volume fractions of free air was evaluated. The employed multiphase modeling approach was presented and a sensitivity analysis on modeling parameters was performed. Overall, it was shown that free air in the suction ports changed the pumping characteristic of the vane pump significantly. Pressure and flow ripple increased, and the volumetric efficiency and the mean power demand decreased significantly with an increasing inlet volume fraction.

Suggested Citation

  • Thomas Lobsinger & Timm Hieronymus & Gunther Brenner, 2020. "A CFD Investigation of a 2D Balanced Vane Pump Focusing on Leakage Flows and Multiphase Flow Characteristics," Energies, MDPI, vol. 13(13), pages 1-24, June.
    • Handle: RePEc:gam:jeners:v:13:y:2020:i:13:p:3314-:d:377640
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    References listed on IDEAS

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    1. Massimo Rundo & Giorgio Altare & Paolo Casoli, 2019. "Simulation of the Filling Capability in Vane Pumps," Energies, MDPI, vol. 12(2), pages 1-18, January.
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    Cited by:

    1. Timm Hieronymus & Thomas Lobsinger & Gunther Brenner, 2021. "A Combined CFD-FEM Approach to Predict Fluid-Borne Vibrations and Noise Radiation of a Rotary Vane Pump," Energies, MDPI, vol. 14(7), pages 1-23, March.
    2. Thomas Lobsinger & Timm Hieronymus & Hubert Schwarze & Gunther Brenner, 2021. "A CFD-Based Comparison of Different Positive Displacement Pumps for Application in Future Automatic Transmission Systems," Energies, MDPI, vol. 14(9), pages 1-24, April.
    3. Qing Guo & Kai Luo & Daijin Li & Chuang Huang & Kan Qin, 2021. "Effect of Operating Conditions on the Performance of Gas–Liquid Mixture Roots Pumps," Energies, MDPI, vol. 14(17), pages 1-23, August.

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