Numerical Simulation and Experimental Study of Oil-Free Double-Warp Air Scroll Compressor

Abstract

In order to analyze the flow characteristics of the internal flow field in the working chamber of the oil-free double-warp scroll compressor, a three-dimensional unsteady numerical simulation of the internal flow field in the working chamber of the compressor is conducted based on the computational fluid dynamics (CFD) method. In order to verify the deviation between the numerical simulation and the actual working process, a test platform for scroll compressors using air as the working medium is built, and the actual output performance parameters of the oil-free double-warp scroll compressor are obtained. The results show that the mass exchange between adjacent working chambers has a greater impact on the working chamber and the distribution of temperature and velocity along the tooth height direction, but has a little impact on pressure. The inlet and outlet mass flow and velocity rate change periodically, and as the compressor speed increases, the theoretical volume flow increases.

Keywords

• oil-free scroll compressor
• double-warp
• thermodynamic model
• numerical simulation
• computational fluid dynamics (cfd)
• experimental study