摘要
目前液压元件的CFD数值模拟都是将流体介质看成不可压缩的,但在高压条件下,油液的可压缩性不能忽略。本文应用CFD方法对轴向柱塞泵配流过程进行了可视化仿真,参照实际柱塞泵的结构和参数,建立了三维几何模型,重点对CFD软件中提供的不可压缩流体模型通过用户自定义函数UDF对其进行了修正。将不可压缩和可压缩流体两种情况下得到的泵出口的流量脉动进行了对比分析,得到了考虑油液的可压缩性时仿真结果更加接近实际情况的结论。
Generally oil is treated as incompressible fluid. But in the high pressure the working medium in axial piston pump ac- tually is weakly compressible fluid. The visual simulation of thw distribution process of axial piston pump was made with CFD method. The mathematical model was set up according to the structure and parameters of piston pump. The amendment was accomplished by programming and loading to the CFD solver through UDF to enhance the standard features of the code. By comparing the flow ripples in pump outlet of compressible and incompressible fluid, the conclusion can be drawn that the simulation results are closer to real condition by taking compressibility into account.
出处
《机床与液压》
北大核心
2008年第5期154-155,212,共3页
Machine Tool & Hydraulics
基金
十一五科技支撑计划资金支持项目(2006BAF01B01006BAF01B04)
关键词
轴向柱塞泵
可压缩性
流量脉动
数值模拟
Axial piston pump
Compressible fluid
Flow ripple
Numerical simulation
作者简介
李静（1983-），硕士研究生，主要从事液压技术和流场仿真研究。电话：0571—87952500，E—mail：lijingishere@yahoo．com．ca。
