Fluid–structure interaction model of dynamic behavior of the discharge valve in a rotary compressor

Abstract

A three-dimensional fluid–structure interaction model is proposed for the discharge valve movement in a rotary compressor. The compression chamber pressure measured by the experiment confirmed that the fluid–structure interaction model is able to predict the valve dynamic behavior precisely. To demonstrate that the fact of the discharge port being covered partly by the cylinder and the roller cannot be ignored in the valve model, another fluid–structure interaction model in which the discharge port is not covered and the cylinder shape is simplified to be cylindrical is also specially presented. In this simplified fluid–structure interaction model, the flow energy loss through the discharge valve is 68.8% of that in the fluid–structure interaction model, and the impact velocity of the valve reed impacting on the retainer is 2.9 m/s higher than that in the FSI model. It is found that the valve reed is obviously inclined because the discharge port is covered partly by the cylinder.