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International Standard Serial Number:
ISSN 1001-4551
Sponsor:
Zhejiang University;
Zhejiang Machinery and Electrical Group
Edited by:
Editorial of Journal of Mechanical & Electrical Engineering
Chief Editor:
ZHAO Qun
Vice Chief Editor:
TANG ren-zhong,
LUO Xiang-yang
Tel:
86-571-87041360,87239525
Fax:
86-571-87239571
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No.9 Gaoguannong,Daxue Road,Hangzhou,China
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310009
E-mail:
meem_contribute@163.com
Abstract: The volume ratio of the two groups of working cavities of the traditional asymmetric scroll compressor was not equal, which led to serious pressure asymmetry during compression, and increased the exhaust loss and exhaust pulsation. Aiming at this problem, a numerical simulation study of an asymmetric asynchronous exhaust scroll compressor with equal content product ratio was carried out. Firstly, the geometric model of asymmetric scroll compressor was established, the structural principle of asymmetric asynchronous exhaust scroll structure was deduced, and the volume change of its working chamber was analyzed. Then, the fluid domain of the structure was divided into structured grids, and the transient numerical simulation was carried out to study the distribution characteristics of the pressure field, temperature field and velocity field in the cavity. Finally, under the same conditions, the performance of the asymmetric asynchronous exhaust scroll compressor was compared with that of the traditional asymmetric scroll compressor. The results show that the flow field in the cavity of the asymmetric asynchronous exhaust structure is asymmetrically distributed, the pressure field in the same working cavity is relatively uniform, and the exhaust pressure difference between the two groups of working cavities is within 2%, but the temperature field and velocity field in the same working cavity are affected by the radial clearance, and its non-uniformity is large. By comparing the performance, the exhaust pressure loss of the structure is only 6.6%, the exhaust temperature is reduced by 8.1K, the pulsation intensity of the exhaust is reduced by 34.9%, and the exhaust process of scroll compressor is more stable.
Key words: scroll compressor; asynchronous exhaust; radial clearance; exhaust loss; exhaust temperature; transient numerical simulation
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