储水罐水位调节阀内部流场数值模拟及流道结构改进

The Numerical Simulation of Internal Flow Field and Flow Channel Improvement of Level Control Valve of Water Storage Tank

针对某超(超)临界火电机组锅炉储水罐水位调节阀内部流场的漩涡问题,利用CFD技术对其内部流场进行仿真分析,得到该阀在不同开度下的漩涡的分布情况,为流道结构改进设计提供了依据。以扩大阀体内腔,减小阀体内壁边界倾斜度的原则对其流道结构进行改进,提出相应的改进方案,并对结构改进后的阀门在全开时的内部流场进行仿真分析,证明改进后的方案基本消除了漩涡。通过对流场数值模拟和流道结构改进为储水罐水位调节阀的结构设计提供了理论依据。

To solve the problem of an ultra-supercritical boilers whirlpool tank level control valve internal flow field,the study researches on the internal fluid flow characteristics with CFD to improve the design of the flow channel structure and reduce vortex effectively. In the principle of expanding the inner cavity of the valve body and reducing the inner wall of the valve body and reduce the inclination of the inner wall of the valve body,the corresponding improvement scheme is put forward,and the internal flow field of the valve in the fully open valve is simulated and analyzed. It is improved that the improved scheme basically eliminated the whirlpool. This paper provides a theoretical basis for the structural design of level control valve of water storage tank.