The transient flow field characteristics of tangential leakage in scroll compressor

doi:10.19799/j.cnki.2095-4239.2021.0176

Abstract

Abstract:

Focusing on a miniature compressed air reservoir scroll compressor, the computational fluid dynamics method numerically simulated the working processes of the scroll compressor. Additionally, the internal pressure field, temperature field, and the velocity vector field of the scroll compressor were obtained. The distribution characteristics of the tangential leakage, caused by the radial gap on the flow field of the scroll compressor's working cavity, were studied. The results showed that gas in the high-pressure cavity leaked into the low-pressure cavity through the radial gap, which caused the velocity vector and temperature fields in the cavity were not uniformly distributed, and leakage had little effect on the unevenness of the pressure field distribution; however, it had a greater impact on the unevenness of the temperature and velocity vector fields. The downstream gas in a single cavity was compressed, which gave rise to pressure within the cavity. The distribution was not uniform, and the existence of pressure differences affected changes in the velocity vector field distribution. The offset of the exhaust hole caused pressure asymmetry in the symmetrical cavity. This research presents a theoretical basis for the structural design of scroll compressors.

Key words: scroll compressor, radial leakage, transient analysis, numerical simulation

CLC Number:

TH 45

Zheng LI, Zhen LIU, Huawei WU, Dongsheng XIE, Wei QIAN. The transient flow field characteristics of tangential leakage in scroll compressor[J]. Energy Storage Science and Technology, 2021, 10(5): 1579-1588.

Figures/Tables 15

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参数	数值
基圆半径/mm	3
偏心距/mm	6.2782
涡旋齿高度/mm	40
涡旋齿壁厚/mm	3.14
渐开线发生角/rad	0.523
圈数	2.75

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