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One-Dimensional Fluid Dynamic Modeling of a Gas Bladder Hydraulic Damper for Pump Flow Pulsation

Author

Listed:
  • Paolo Casoli

    (Department of Engineering and Architecture, University of Parma, Parco Area delle Scienze 181/A, 43124 Parma, Italy)

  • Carlo Maria Vescovini

    (Department of Engineering and Architecture, University of Parma, Parco Area delle Scienze 181/A, 43124 Parma, Italy)

  • Massimo Rundo

    (Department of Energy, Politecnico di Torino, C.so Duca degli Abruzzi 24, 10129 Turin, Italy)

Abstract

Positive displacement pumps produce pressure ripple that can be reduced with the attenuation of the generated flow ripple. This paper presents the application of a gas bladder hydraulic damper with the aim of reducing the oscillations of the delivery flow rate of positive displacement machines. This work is focused on the development of a 1D fluid dynamic model of the damper, which is based on the fundamental fluid motion equations applied for a mono-dimensional flow. In order to represent the fluid flow inside the damper, a particular evaluation of the sound speed has been implemented. Experimental tests have been performed involving an axial piston pump with the damper installed in the delivery pipe to validate the model; tests were carried out at different pump working conditions and with different gas precharge pressure of the damper. The test results confirmed the effectiveness of the device, and the comparison with numerical results demonstrated a good agreement. Simulations have been carried out to investigate the influence of various parameters on damper effectiveness.

Suggested Citation

  • Paolo Casoli & Carlo Maria Vescovini & Massimo Rundo, 2023. "One-Dimensional Fluid Dynamic Modeling of a Gas Bladder Hydraulic Damper for Pump Flow Pulsation," Energies, MDPI, vol. 16(8), pages 1-18, April.
    • Handle: RePEc:gam:jeners:v:16:y:2023:i:8:p:3368-:d:1121037
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    References listed on IDEAS

    as
    1. Paolo Casoli & Mirko Pastori & Fabio Scolari & Massimo Rundo, 2019. "Active Pressure Ripple Control in Axial Piston Pumps through High-Frequency Swash Plate Oscillations—A Theoretical Analysis," Energies, MDPI, vol. 12(7), pages 1-18, April.
    2. Xinran Zhao & Andrea Vacca, 2019. "Theoretical Investigation into the Ripple Source of External Gear Pumps," Energies, MDPI, vol. 12(3), pages 1-26, February.
    3. Paolo Casoli & Carlo Maria Vescovini & Fabio Scolari & Massimo Rundo, 2022. "Theoretical Analysis of Active Flow Ripple Control in Positive Displacement Pumps," Energies, MDPI, vol. 15(13), pages 1-22, June.
    4. Alessandro Corvaglia & Massimo Rundo & Paolo Casoli & Antonio Lettini, 2021. "Evaluation of Tooth Space Pressure and Incomplete Filling in External Gear Pumps by Means of Three-Dimensional CFD Simulations," Energies, MDPI, vol. 14(2), pages 1-16, January.
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