水力缓冲器三维流场数值分析

Numerical Analysis of Hydraulic Absorber Flow Field

以水力缓冲器为研究对象,在实验研究的基础上,运用计算流体力学软件FLUENT对水力缓冲器高、低压缓冲腔进行三维流场数值分析。结果表明,高压缓冲腔节流孔的流动阻力是水力缓冲器的主要阻力环节,节流孔的流动阻力随柱塞位移增大而增加。根据节流孔流量系数变化曲线计算得到的水力缓冲器缓冲位移曲线与实验结果符合很好,验证了三维流场数值分析模型的正确性。同时得到了表征缓冲器特性的缓冲力-缓冲位移曲线,为水力缓冲器的结构设计和优化改进提供了依据。

The 3D flow field in the high and low pressure buffer chamber of hydraulic absorber（HA） was studied with computational fluid dynamics software FLUENT on the basis of the experimental results.The results show that the flow resistance of orifices of the high pressure buffer chamber is the major hydraulic resistance part of HA.And flow resistance of orifices increases with piston displacement.Based on the variation curves of flow coefficients of orifices,the calculated buffering displacement curves are in good agreement with the test results,which demonstrates the validity of the 3D flow field numerical analysis model.And the buffering force versus piston displacement curve which characterizes the performance of the HA was obtained.The work of this paper laid foundation for optimal design of the HA.