液压与气动2026，Vol.50Issue(9)：39-46,8.DOI:10.11832/j.issn.1000-4858.2026.09.005
轴向柱塞泵内不稳定流动及流致噪声特性研究
Unsteady Flow and Flow-induced Noise Characteristics in Axial Piston Pump
摘要
Abstract
To address the difficulty in predicting flow-induced noise due to complex unsteady internal flow in axial piston pumps,a fluid-structure-acoustic multi-field coupling method is proposed to systematically analyze unsteady flow,housing vibration,and flow-induced noise.Firstly,the Smagorinsky large eddy turbulence model is adopted,with pistons and cylinder block set as rotating domains.The reciprocating motion of pistons is simulated using moving mesh and kinematic equations.Secondly,based on Lighthill's acoustic analogy,flow stress tensors and normal mass flow are mapped onto the acoustic mesh as acoustic sources.Vibration excitation is defined using sound pressure and the normal vector of the housing surface.A COMSOL multiphysics coupling model is then constructed.An experimental platform is built to validate the algorithm.Results show that oil flows out as a jet from the damping grooves of the valve plate.Sudden changes in pressure and velocity induce pressure pulsations,which act on the inner wall of the pump housing,excite housing vibration,and radiate flow-induced noise.The internal fluid sound source peak reaches up to 160 dB,but noise significantly attenuates through pump structure transmission,with radiated housing noise dropping to about 40 dB.Flow-induced noise exhibits wideband characteristics across the entire frequency range,and sound pressure level gradually decreases with increasing frequency.The measured total sound pressure level of housing-radiated noise is 63.79 dB,while the numerical simulation result is 53.43 dB.The close agreement validates the accuracy of the proposed method.关键词
轴向柱塞泵/流致噪声/多物理场耦合/压力脉动/特征频率Key words
axial piston pump/flow-induced noise/multiphysics coupling/pressure pulsation/characteristic frequency分类
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古典林,汤何胜,赵申诞,金玉柱,高丽陕,綦法群..轴向柱塞泵内不稳定流动及流致噪声特性研究[J].液压与气动,2026,50(9):39-46,8.基金项目
国家自然科学基金面上项目(52275064) （52275064）
