Simulation Analysis of Flow Characteristics of a Novel Flap Check Valve Based on CFD Method

Abstract The traditional check valves mainly include lift check valves and swing check valves, but the lift check valve has a larger fluid resistance, and the swing check valve has a longer opening/closing time and slow dynamic response. In this paper, a new type of flap check valve is proposed based on the inspiration of the heart valve. To study the dynamic response of the valve and the flow characteristics of the flow field in the valve, a three-dimensional analysis model of the valve is established based on the dynamic mesh theory using the computational fluid dynamics (CFD) method, and the CFD simulation of the flow characteristics of the valve is carried out by setting the boundary conditions and working parameters. The transient flow field characteristics and the force state of the valve disc are discussed and analyzed. The simulation results show that: the dynamic response of the flap check valve in the process of opening and closing is faster than that of the swing check valve, and the flow line of the valve is close to laminar flow, so it is not easy to have turbulent flow phenomenon similar to that in the lift check valve.