基于CFD的蝶阀流场仿真和阀板驱动力矩研究  

Study on Simulation of 3D Flow Field and Moment on Valve Plate for Butterfly Valve based on CFD

作　　者：沈洋[1] 金晓宏[1] 杨科[1] 

机构地区：[1]武汉科技大学机械自动化学院,武汉430081

出　　处：《新型工业化》2013年第4期69-76,共8页The Journal of New Industrialization

基　　金：国家自然科学基金(51245013)

摘　　要：为了实现对蝶阀开度的精确控制,计算流动介质对阀板转轴的力矩非常有必要。本文以空气作为流动介质,利用CFD软件,对某蝶阀随阀板开度连续变化的流场进行了模拟仿真,得出了阀板处于不同开度时的速度场、压力场分布规律,并得到了阀板气动力矩特性曲线。结果表明:气流绕过阀板边缘时发生边界分离,阀板背面产生涡旋;随着阀门开度变大,力矩特性呈现单调递增的规律,在阀板开度为70°左右时,阀板两侧面对阀板轴的合力矩达到最大,之后力矩开始单调递减,开度为90°时,合力矩接近为0。In order to control the opening of butterfly valve accurately, the calculation of moment that flow medium acted on valve plate is very necessary. Air is taken as the flow medium and the flow field that changing with the opening of valve is simulated by CFD. The regularities of distribution of velocity field and pressure field are obtained, as well the curve of aerodynamic moment. The results show that, boundary layer separation occurs after the air flows around the edge of the valve plate and vortex emerges at the back of valve plate. With the valve opening going larger, the moment characteristics is monotonically increased, until the opening of valve plate turns 70°, the resultant moment of the valve plate reaches its maximum, and then it begins monotonically decreasing, the resultant moment is close to 0 at 90o.

关 键 词：流体传动与控制 蝶阀 流场 开度 气动力矩 

分 类 号：TG3[金属学及工艺—金属压力加工] U46[机械工程—车辆工程]