Interior Flow-field Numerical Simulation And Static Analysis Of Butterfly-vale And Multi-discs Valve

Butterfly-valves are more widely used for flow control in a variety of processes. The advantages of this type of valve are their simplicity, their low cost their speed of closing and the weak pressure drop which they produce when they are completely open. According to conditional demand of hot and cold airflow ventilation system of some solar battery manufacturing equipment and based on construction of butterfly-valve, this paper designs and researches the rectangular and multi-disc control valve(For short:multi-discs valve) which has a linear flux characteristic.This paper takes ANSYS Workbench as a platform and carries out flow field numerical simulation of butterfly-valve and multi-discs valve in its professional fluid analysis software CFX’s module. It provides the detailed distributions of3-D flow field parameters when valve with various opening degree. Through the analysis of the simulation results, this paper obtains the valve’s flow characteristics, such as the flow coefficient, flow resistance coefficient, aerodynamic torque coefficient and so on, and butterfly-valve’s simulated data is agreed with the experimental data. It investigates the reliability and validity of numerical simulation. This paper also proposed a method which takes the first field analysis’s result as the second structure analysis’s load to carry on the analysis of fluid-structure interaction, used of ANSYS Workbench’s convenient data transfer function. Using this method, this study completes the topology optimization of butterfly-valve disc and the analysis of static structure of improved butterfly-valve disc and multi-discs valve plate.Through the analysis of flux characteristic curve, flow resistance characteristic curves and aerodynamic torque coefficient curve, we know that the flux characteristic is percentage characteristics; flow resistance coefficient angle increases exponentially as the valve is closed: The peak of the torque coefficient occurs at valve opening in the neighborhood of 80degrees. Improved butterfly-valve’s flow resistance coefficient dropped to0.39from0.58at the fully open, and performance of the structure also meets the requirements. The multi-discs valve’s flow characteristic is a linear flux characteristic; flow resistance coefficient turned sharply lower as the valve is opened. We also analyzed the torque of multi-discs valve and give recommendation to select an actuator.