Simulation solution method for elastic components of Venturi constant air volume valves

The Venturi constant air volume valve is widely used in air volume and pressure control of controlled environment due to its rapid response and extensive pressure-independent range. The elastic component is a key component of the valve, and its performance affects the accuracy of the constant air volume control. In this paper, through CFD numerical simulation and experimental verification, the internal flow field distribution, flow resistance characteristics and the relationship between the valve core’s force and displacement are obtained. Furthermore, a simulation solution method for the performance curve of the elastic components based on CFD simulation is proposed. The results show that the elastic components obtained by this method can make the valve achieve good pressure independent constant air volume control performance. Under the conditions of a flow range of 500 to 1 800 m3/h and a valve working pressure differential of 300 to 550 Pa, the flow deviation rate can be controlled within 5%, and the valve has a high constant air volume control accuracy under this working condition.