Scientific journal NRU ITMO
Series "Refrigeration and Air Conditioning"
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December 2014 (published: 23.12.2014)

Number 3(16)

Home > Issue > To leakage calculation in working part of a screw compressor

UDC 621.514

To leakage calculation in working part of a screw compressor

V.N. Dokukin, Pronin V.A.

In the article it is considered a mathematical model and calculation method of refrigerant-oil mixture flow through gaps in the working part of the oil screw compressor with movability of their walls. Analysis of different types of gaps, which was made by the authors, has shown that reciprocal movement of the walls and working fluid takes place in most of the gaps of the screw compressor, but walls on the contact line and from the side of discharge has the same direction movement.  Due to the fact of velocity vectors matching leakage increases, therefore it becomes necessary to take them into account, which was in the proposed mathematical model. Due to the proposed method of calculation of leakage, the accuracy of volume coefficient calculation of oil screw compressor improves. The adequacy of the proposed method has been confirmed by experimental data, by comparing the calculated volume coefficient taking into account the proposed methodology with volume coefficient obtained during the test of experimental compressor.
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Keywords: volume coefficient, leakage of working fluid, gaps classification.

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