Parameterized Modeling of Flow Characteristics of Thrust Regulating Ball Valves
Regulating valves are widely used in the field of industrial automation,for precise control of fluid flow,pressure,temperature and other parameters.The thrust regulating valve applied to the thrust control system of reusable liquid oxygen/methane engine is a floating seat rectangular-opening ball valve,which regulates the power of the turbine pump by controlling the flow of methane and liquid oxygen into the gas generator,thereby achieving thrust regulation.Firstly,theoretical modeling of the flow characteristics of the regulating valve.A theoretical model is proposed to predict the flow coefficient of the regulating valve by parameterizing the flow characteristics of the valve seat and spool.The theoretical model is validated using CFD simulation and experimental measurement methods,and the theoretical values,simulation values,and measurement values are compared.The results show that the theoretical model can predict the flow coefficient well at medium opening,but there are deviations at very small and very large opening.Finally,further research and improvement directions are pointed out to improve the accuracy of the model at extreme opening.