Journal of Northeastern University(Natural Science) ›› 2025, Vol. 46 ›› Issue (4): 71-77.DOI: 10.12068/j.issn.1005-3026.2025.20239049

• Mechanical Engineering • Previous Articles     Next Articles

Characteristic Analysis on Metering Valves of Fuel Pump Regulators in Aero Engines

Hui-kun CAI1, Zhao-yang LI1, Yi-bo ZHOU1,2, Chen XU1   

  1. 1.Pen -Tung Sah Institute of Micro-Nano Science and Technology,Xiamen University,Xiamen 361102,China
    2.China Aviation Development Control System Research Institute,Wuxi 214063,China. Corresponding author: CAI Hui-kun,E-mail: caihuikun@xmu. edu. cn
  • Received:2023-09-14 Online:2025-04-15 Published:2025-07-01

Abstract:

In order to improve the control accuracy and performance quality of fuel pump regulators for an aero engine, a simulation model and an experimental bench of the metering valve were built based on AMESim, and the linear relationship between the engine outlet flow and the valve’s opening degree was analyzed. It was found that the engine outlet flow changes linearly with valve opening, but both the inlet and outlet pressures change slowly initially and then increase greatly when the valve’s opening reaches 60%. Meanwhile, the pressure difference of the inlet and outlet is almost at 0.5 MPa. The simulation results agree well with the experimental results, and the differences of the steady and dynamic states are below 5% and 10%, respectively. Furthermore, the effects of the system’s rotating speed and outlet load on the metering valve performance were also studied, and it was found that the system’s rotating speed plays a large role on the metering valve performance as there can be some pressure overshoot and hydraulic impact when it changes, whereas the outlet load plays a small role on the metering valve performance as there is no pressure overshoot but there is a little lagging.

Key words: aero engine, fuel pump regulator, metering valve, steady characteristics, dynamic characteristics

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