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Experimental Measurement and Numerical Validation of the Flow Ripple in Internal Gear Pumps

Author

Listed:
  • Alessandro Ferrari

    (Department of Energy, Politecnico di Torino, 10129 Turin, Italy)

  • Paola Fresia

    (Department of Energy, Politecnico di Torino, 10129 Turin, Italy)

  • Massimo Rundo

    (Department of Energy, Politecnico di Torino, 10129 Turin, Italy)

  • Oscar Vento

    (Department of Energy, Politecnico di Torino, 10129 Turin, Italy)

  • Pietro Pizzo

    (Rabotti Srl, 10148 Turin, Italy)

Abstract

The flow ripple in an internal gear pump was measured by means of a new instantaneous high-pressure flowmeter. The flowmeter consists of two pressure sensors mounted on a piece of the straight steel pump delivery line, and a variable-diameter orifice was installed along such a line, downstream of the flowmeter, to generate a variable load. Three distinct configurations of the high-pressure flowmeter, characterized by a different distance between the pressure transducers, were analyzed. Furthermore, a comprehensive fluid dynamic 3D model of the pump and of its high-pressure delivery line was developed and validated in terms of both the delivery pressure and the flow ripple for different pump working conditions. For the three examined configurations of the flowmeter, the measured flowrate time histories matched the corresponding numerical distributions at the various operating points. Finally, the validated 3D model was applied to predict the incomplete filling working of the interteeth chambers, and the obtained numerical pressure time histories along the delivery line were used, as input data, to assess the reliability of the flowmeter algorithm even in these severe operating conditions.

Suggested Citation

  • Alessandro Ferrari & Paola Fresia & Massimo Rundo & Oscar Vento & Pietro Pizzo, 2022. "Experimental Measurement and Numerical Validation of the Flow Ripple in Internal Gear Pumps," Energies, MDPI, vol. 15(24), pages 1-15, December.
    • Handle: RePEc:gam:jeners:v:15:y:2022:i:24:p:9607-:d:1007076
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    References listed on IDEAS

    as
    1. Gianluca Marinaro & Emma Frosina & Adolfo Senatore, 2021. "A Numerical Analysis of an Innovative Flow Ripple Reduction Method for External Gear Pumps," Energies, MDPI, vol. 14(2), pages 1-22, January.
    2. 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.
    3. Valeriy Sanchugov & Pavel Rekadze, 2022. "New Method to Determine the Dynamic Fluid Flow Rate at the Gear Pump Outlet," Energies, MDPI, vol. 15(9), pages 1-29, May.
    4. Ferrari, A. & Novara, C. & Paolucci, E. & Vento, O. & Violante, M. & Zhang, T., 2018. "Design and rapid prototyping of a closed-loop control strategy of the injected mass for the reduction of CO2, combustion noise and pollutant emissions in diesel engines," Applied Energy, Elsevier, vol. 232(C), pages 358-367.
    5. 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.
    6. Massimo Rundo & Alessandro Corvaglia, 2016. "Lumped Parameters Model of a Crescent Pump," Energies, MDPI, vol. 9(11), pages 1-23, October.
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