摘要
对绝大多数液压系统结构而言,气穴是一种有害的流体现象,长期以来一直不断受到人们的关注和研究。笔者选取一闸阀采用对称模型进行研究,为了更好地优化闸阀内流场结构,采用ANSYS作为FLUENT前处理。在流场梯度变化大的区域利用自适应网格方法自动加密网格,求解方法采用SIMPLEC,离散格式均采用二阶差分格式。通过模拟表明,在阀体内壁面及阀座位置容易出现气穴,并且这些位置存在强度不等的漩涡。采用该方法,不但可以实现阀门内部流场的优化,还可以方便实现流-固耦合,因此,该方法为阀门的合理设计提供理论基础。
As a harmful phenomenon in most hydraulic system, the cavitation has always been studied. In the paper, the symmetry model of a gate valve was applied to carry out the study work. In order to optimize the flow field of the gate valve, ANSYS served as the preprocessor of FLUENT. In the area with great gradient, the mesh was densified by self-adaptive method, SIMPLEC served as solution, and two-order difference scheme as the discrete format. Simulation showed that the cavitation and different-strength vortices easily occurred on the inner wall surface of the valve body and the valve seat. The method was contributed to realizing the optimization of the flow field in the valve and fluid-structure interaction, and offered theoretical basis for reasonable design of the valve.
出处
《矿山机械》
北大核心
2012年第11期93-96,共4页
Mining & Processing Equipment
基金
科技部"十一五"计划基金资助项目(2008BADC4B15)
过程控制与装备工程四川省高校重点实验室项目(GK201006)
