缝隙式减振器的力学性能CFD仿真研究  

Study on CFD Simulation of Mechanical Properties of Slit-type Shock Absorber

作　　者：王之军 叶辉[2] 刘亚培 WANG Zhijun;YE Hui;LIU Yapei(Technology Center,Pinggao Group Co.,Ltd.,Pingdingshan 467001,China;;College of Automotive Engineering,Jilin University,Changchun 130022,China)

机构地区：[1]平高集团有限公司技术中心,河南平顶山467001 [2]吉林大学汽车工程学院,长春130022

出　　处：《长春大学学报》2018年第12期6-11,共6页Journal of Changchun University

基　　金：国家自然科学基金项目(51675217);平高集团有限公司项目(PGKJ2017-012)

摘　　要：对应用于高压开关的缝隙式减振器进行了CFD仿真方法的研究。以获得减振器工作时的内部峰值压力为目标,运用FLUENT软件对缝隙式减振器的内部流场区域进行了仿真分析。对缝隙式减振器的缝隙结构按缝隙大小从变截面处开始分块,根据活塞的具体运动规律,在分块后的流域中分别进行CFD动网格仿真模拟,得到了减振器内部压力场及峰值压力。通过缝隙流动部分的流体力学公式对减振器工作时的摩擦阻力进行了理论计算,对仿真误差进行了理论分析。通过CFD仿真结果与相关实验的对比,验证了仿真方法的合理性。CFD simulation method of the slit-type shock absorber used in high-voltage switches is studied.Aiming at the acquisition of the peak pressure of the shock absorber,the internal flow field of the slit-type shock absorber is simulated by FLUENT software.The slit structure of the slit-type shock absorber is partitioned at variable cross-section according to the gap sizes,and based on the specific motion law of the piston,CFD dynamic mesh simulation is carried out in the partitioned fields,and the internal pressure profile and peak pressure are obtained.The frictional resistance of the shock absorber is theoretically calculated by the crevice flow formula,and the simulation error is theoretically analyzed.The rationality of the simulation results is confirmed by comparing CFD simulation results with related experiments.

关 键 词：缝隙式减振器 内部压强 CFD仿真 动网格 

分 类 号：U463[机械工程—车辆工程]