| Citation: | JIANG Huijun, ZHANG Junyu, ZHOU Xiaokai, et al. Analytic expression and series expansion of pulsation pressures of aviation hydraulic pumps[J]. Journal of Aerospace Power, 2023, 38（1）：197-205 doi: 10.13224/j.cnki.jasp.20220288
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To deeply research the pressure pulsation characteristics of aviation hydraulic piston pumps, the movement of the pumps and the causes of volume flowrate pulsation were analyzed respectively. Furthermore the relationship between the oil pressure and the volume flowrate pulsation function was established, and the volume flowrate pulsation function expression from the pump discharge nozzle was deduced. Finally, the multistage pulsation pressure curves consistent with the experimental data were simulated through the Fourier series. The results showed that the relative errors of the simulated pulsating pressure curve and the experimental data were within 5%, and the relative errors of the pressure amplitudes at the fundamental frequency and the double frequency were within 1%. The series approximation including the fundamental frequency and the double frequency can be used to describe the main characteristics of the periodic pulsating pressure at the outlet of the aircraft hydraulic piston pump. The research results provide a load input basis for the fluid-structure interaction vibration simulation of the pipeline structure of the aircraft hydraulic system.
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