文丘里定风量阀弹性组件的仿真求解方法
Simulation solution method for elastic components of Venturi constant air volume valves
摘要：
文丘里定风量阀由于响应快、压力无关范围大等特点在受控环境的风量与压力控制领域有着广泛的应用。弹性组件是阀门的关键部件,其性能影响定风量控制的精度。本文通过CFD数值仿真模拟和实验验证,得到了阀门内部流场分布、流阻特性及阀芯受力与位移的关系,提出了基于CFD仿真的弹性组件性能曲线模拟求解方法。研究表明:使用该方法得到的弹性组件能够使阀门获得良好的压力无关定风量控制性能;流量范围在500～1 800 m3/h且阀门工作压差在300～550 Pa时,流量偏差率能够控制在5%以内,阀门在此工况下具有较高的定风量控制精度。
Abstract：
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.
Keywords:constant air volume valve; elastic component; flow resistance characteristic; numerical simulation; experimental research