基于CFD技术的新型液气缓冲器流场计算分析与试验研究  

The Computational and Test of the Flow Field for New Type Hydraulic-gap Buffer Based on CFD

作　　者：张宏[1] 郑彪[1] 张楠[2] 卫鹏斌[1] 

机构地区：[1]大连理工大学机械工程学院,辽宁大连116024 [2]营口职业技术学院,辽宁营口115000

出　　处：《液压气动与密封》2014年第12期32-38,共7页Hydraulics Pneumatics & Seals

摘　　要：该文基于CFD技术,利用动网格模型,同时采用标准k-ε模型和SIMPLEC算法,运用CFD软件FLUENT对新型节流芯轴式液气缓冲器进行几何建模、数值模拟和可视化研究,分析模型关键部位的流场特性,得到内部流场压力和速度分布特性以及缓冲特性曲线,分别对不同缓冲间隙,节流芯轴形状和冲击速度进行仿真实验,获得各参数对液气缓冲器缓冲特性的影响,为新型液气缓冲器关键部位参数的确定和内部结构的优化提供了参考依据。同时将仿真结果与试验进行对比分析,结果表明采用CFD方法对缓冲器流场进行仿真分析是可行的。In this paper,the flow field of the new type hydraulic-gap buffer was studied with CFD software FLUENT.Dynamic mesh technology together with standard k-ε turbulence model and the SIMPLEC algorithm was utilized in the research.Based on constructed dynamic mesh model of the new type buffer,the flow characteristic of the key parts of the new type buffer was analyzed by velocity flow distribution as well as the cushion curve.Furthermore,the effect of cushioning gap,throttling shape and impact velocity on cushioning characteristics of the new type hydraulic-gap buffer was studied respectively,which will provide the reference for the parameter determining and structure optimizing of the inner channel in the new type hydraulic-gap buffer.The validation of simulation results was verified with experiment,which shows that the CFD method is suitable for analyzing the new type hydraulic-gap buffer.

关 键 词：计算流体动力学 液气缓冲器 动网格 数值模拟 FLUENT 

分 类 号：U270.34[机械工程—车辆工程]