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

doi:10.16183/j.cnki.jsjtu.2021.115

Abstract

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.

Key words: oil-free scroll compressor, double-warp, thermodynamic model, numerical simulation, computational fluid dynamics (CFD), experimental study

CLC Number:

TH455

SUN Jian, PENG Bin, ZHU Bingguo. Numerical Simulation and Experimental Study of Oil-Free Double-Warp Air Scroll Compressor[J]. Journal of Shanghai Jiao Tong University, 2022, 56(5): 611-621.

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参数	取值	参数	取值
r_b/ m	9.231×10^-3	α/(°)	13.98
t/m	4.450×10^-3	φ_b/(°)	45
h/m	65.00×10^-3	φ_e/(°)	765

参数	单涡旋齿	双涡旋齿
r_b/m	9.231×10^-3	9.231×10^-3
α/(°)	13.980	13.980
t/m	4.45×10^-3	4.45×10^-3
r_or/m	24.500×10^-3	10.000×10^-3

名称	体网格单元数	网格节点数
进气管	23,337	10,189
工作腔	5,613,089	2,608,404
排气管	80,100	13,762
总计	5,716,526	2,632,355