抑制调节阀流场空化的响应面结构优化OA北大核心CSTPCD

Cavitation of the flow field in regulating valve can cause cavitation vibration and noise.Optimizing the structure of valve trims to suppress cavitation is an important part of designing high quality valves.The outer sleeve and cage seat of a multistage pressure reducing valve are designed to gradually reduce pressure to suppress cavitation in the flow field.The flow characteristics of the flow field are numerically simulated using Fluent software,and the flow rate and pressure distribution are obtained at some typical openings.A circulating parallel flow testing device is used,and flow rate experiments were conducted on the valve to verify the reliability of the numerical simulation.The influence of the orifice size,the number of holes,and their interaction in the outer sleeve and cage seat on the cavitation of the flow field is explored using the Box-Behnken response surface optimization method,and the optimal design scheme is obtained.The results show that,under the condition of not affecting the flow characteristics of the valve,the maximum gas volume fraction decreased from 0.88 to 0.19 at a 70％opening.It effectively suppressing the cavitation in the flow field in the valve.