In order to overcome the shortcomings of the existing swing check valves that generate noise and are easy to be damaged by impact when they are subjected to high reverse pressure and high flow speed,a new shuttle-type check valve was designed.The basic structure and the work principle of this new check valve were introduced.Moreover,the characteristics of the turbulent flow in the check valve and the governing equations based on Reynolds average method were analyzed.The operation process of the shuttle-type check valve was then simulated using the standardk-εmodel.Further more,through several ways including opening discharge hole on the bearing,reducing sudden change of the diameter of the valve body,and setting curved outer surface on the core,a structural optimization algorithm that aims to minimize the pressure drop was proposed.Numerical simulation results showed that the pressure drop in the optimized structure can be reduced by 21%.
