中国机械工程2016，Vol.27Issue(15)：2091-2099,2106,10.DOI:10.3969/j.issn.1004-132X.2016.15.019
基于VOF模型与动网格技术的油气悬架气液两相流数值模拟
Gas-liquid Two-phase Flow Numerical Simulation of a Hydro-pneumatic Suspension by VOF Model and Dynamic Mesh Method
摘要
Abstract
Considering that the hydro-pneumatic suspension of a large-scale mining dump truck was a type of oil and gas contact suspension,the multiphase flow numerical simulation method was considered to be used to analysis the nonlinear characteristics.At first,a gas-liquid two-phase flow model was set up in Fluent software by VOF method,on the basis of discussing the applicability of existing multiphase flows modeling methods and the applicability of turbulence model.During the simulation,VOF model was able to track and locate the oil-gas interface and transfer the pressures between them.Dynamic grid technique was introduced and the movement of the two-phase flow model boundary was defined by UDF technique.In order to obtain the velocity and pressure contours of the suspension in different times,the time-dependent numerical simulation of the tension and compression processes of the hydro-pneumatic suspension was conducted,combining the VOF model and dynamic mesh method.The pressure changes in the air chamber and the pressure differences in the oil chamber due to the valve system structure was extracted,and then the stiffness and damping characteristics were calculated.Finally,the two-phase flow simulation results was validated with the help of a vehicle field measurements.关键词
油气悬架/VOF模型/动网格技术/刚度阻尼特性Key words
hydro-pneumatic suspension/volume of fluid(VOF)model/dynamic mesh method/stiffness and damping characteistics分类
矿业与冶金引用本文复制引用
张沙,谷正气,赵敬凯,徐亚,伍文广..基于VOF模型与动网格技术的油气悬架气液两相流数值模拟[J].中国机械工程,2016,27(15):2091-2099,2106,10.基金项目
国家高技术研究发展计划(863计划)资助项目(2012AA041805) （863计划）
中央财政支持地方高校发展专项资金资助项目(0420036017) （0420036017）
交通运输部新世纪十百千人才培养项目(20120222) （20120222）
湖南大学汽车车身先进设计与制造国家重点实验室自主课题(734215002) （734215002）
