AP1 000核电汽轮机中压调节阀气动力矩数值模拟

Numerical Simulation of Aerodynamic Moment of Medium Pressure Regulating Valve for AP1 000 Nuclear Power Turbine

研究气动力矩的变化规律对蝶阀的可靠控制具有重要意义。以AP1000核电汽轮机中压调节阀为研究对象，采用Fluent对调节阀开度为10°-80°的三维流场进行了数值模拟，得到了速度场、压力场分布以及气动力矩的变化规律。结果表明：速度分布和压力分布的不均匀性随调节阀开度的增加先增强后减弱，开度为30°时最为明显。气动力矩随调节阀开度的增加先增大后减小，开度为30°时达到最大值。

The study of the change regulation of the aerodynamic torque is very important for the reliable control of butterfly valve. The study object is medium pressure regulating valve of AP1000 nuclear power turbine, the three dimensional flow field of the control valve opening degree between 10°- 80° was simulated by using Fluent, the velocity field distribution, the pressure field distribution and the change regulation of the aerodynamic torque are obtained. The results show： The nonuniformity of the velocity field distribution and the pressure field distribution first enhanced and then weakened with the increase of the valve opening degree, 30 degree is the most obvious. Aerodynamic torque first increase and then decrease with the increase of the valve opening degree, when the opening degree is 30 degrees, the maximum value is reached.