Abstract
In check valves used in fluid equipments, the pendulum oscillation-like vibration motions of the plug are observed in a visualization experiment using a high speed camera, when heavy noises generate around the valves. The same kind of motion was re-created by a numerical simulation which is based on the coupled analysis of the plug motion with the fluid flow motion analyzed by a CFD with Moving-Dynamic-Mesh method. Changes of the simulated plug vibration motion with one of the valve operation or geometrical parameters show the same tendency as the actual changes. Therefore, this proposed analytical method used here is expected to contribute to the valve-designs aiming at preventing the above-mentioned vibrations.
