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。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,研究了阀板处于不同开度时的速度场和压力场分布规律,并得到了阀板气动力矩特性曲线。发现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°时合力矩接近零。
In order to control the opening of butterfly valve accurately, it is of great importance to calculate the moment that flow medium acts on the valve plate. Taking air as the flow medium, the flow field that changes with the opening of valve is simulated using computational fluid dynamics software. Then the distributions 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 valve plate and vortexes emerge at the back of valve plate. With the opening of valve going larger, the moment is monotonically increased, until the opening of valve plate turns 70°, when the resultant moment of the valve plate reaches its maximum, and then it begins to monotonically decrease with the resultant moment close to 0 at 90°.
出处
《中国科技论文》
CAS
北大核心
2013年第8期820-823,共4页
China Sciencepaper
基金
国家自然科学基金资助项目(51245013)
关键词
流体
蝶阀
流场
开度
气体动力学
fluid
butterfly valve
flow field
opening
aerodynamics
