The Research on Vibration Analysis of Blow-Down Wind Tunnel Pressure Regulating Valves

Abstract

The pressure regulating valves are crucial segments to control the pressure of the stability chambers in the transonic and supersonic blow-down wind tunnels. To solve the valves vibration problem, the pistons and their supporting structures of three typical pressure regulating valves in China Aerodynamics Research and Development Center (CARDC) were analyzed based on the modal analysis theory. From the analysis, two conclusions were obtained that the supporting structures are more rigid than the pistons, and a rigid piston is of critical importance to the valves stiffness. The structural parameters comparing results of the pistons showed the same viewpoint. A new design pressure regulating valve demonstrating the successful application according to the conclusion above was presented.