A mathematical modeling of working chamber volume, constructed from the involute of variable radii circle with double arcs modification, is established in this study. The formulations of working chamber volume which is consisted of the involute of variable radii circle and modified by double arcs at center profiles are accurately deduced, and the orbiting angle of scroll at every moment has a corresponding working chamber volume. The effect of parameters on the working chamber volume is investigated. The different values of initial radius of base circle, starting involute angle, corrected increment, polytropic index and modified angle will change the working chamber volume. Furthermore, the effect of parameters on suction volume and volume ratio has been considered in this study, and the design schemes to obtain the highest volume radio are also studied. These results can be used to provide general implications in calculation of working chamber volume constructed from other type involutes and modifications.
To predict the performance of a rotary compressor and study the dynamic coupling characteristics of the valve, a three-dimensional dynamic model of the compressor is constructed in this paper. The model adopts the fluid–solid interaction method and the dynamic grid technique to achieve coupled reed valve motion. Meanwhile, to solve the problem of grid deformation caused by large deformation of the valve plate, a user-defined dynamic grid method is used to realize grid updating in the deformed area based on computational fluid dynamics method and the ideas of spring smoothing method. The model is validated with a cooling capacity error of 6.07% and an indicated power error of 2%. The stress, the displacement, the velocity and the pressure of the valve is analyzed. The flow characteristics and the dynamic characteristics of the valve plate obtained provide a reference for the design of the compressor.
scite is a Brooklyn-based organization that helps researchers better discover and understand research articles through Smart Citations–citations that display the context of the citation and describe whether the article provides supporting or contrasting evidence. scite is used by students and researchers from around the world and is funded in part by the National Science Foundation and the National Institute on Drug Abuse of the National Institutes of Health.