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Flow characteristics of refrigerant-oil mixture through narrow clearances.

[In Japanese. / En japonais.]

Author(s) : FUKUTA M., YANAGISAWA T., SHIMIZU T., DATE H., OGI Y.

Type of article: Article

Summary

Leakage flow through a narrow clearance in refrigerant compressors is a flow of refrigeration oil mixed with refrigerant. Its characteristics are very complicated because there is a possibility of a separation of vapor refrigerant from the oil according to a change of refrigerant solubility with pressure drop in the clearance. In the article, the authors studied the flow characteristics of refrigerant-oil mixtures through the narrow clearance experimentally and theoretically. It was found that the separation of vapour refrigerant from the liquid mixture in the channel does not progress according to the change of saturation solubility, and the flowing liquid is in a supersaturated condition; the diverging shape of the channel induces vapour separation; the vapour separation decreases the flow rate of the liquid mixture through the clearance, and the flow rate can be estimated by analysis with an appropriate separation ratio.

Details

  • Original title: [In Japanese. / En japonais.]
  • Record ID : 1997-1371
  • Languages: Japanese
  • Source: Trans. JAR - vol. 13 - n. 2
  • Publication date: 1996
  • Document available for consultation in the library of the IIR headquarters only.

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