Approximate functions for determining the delivery coefficient of a rotational compressor

I. S. Berezin, S. S. Danilenko, and V. A. Orlov, “Determining the delivery coefficient of a rotational compressor with internal removal of the heat of compression,” Khim. Neft. Mashinostr., No. 3, 25–27 (1987). I. S. Berezin, “Development and investigation of a rotational compressor for microcryogenic technology,” Dissertation for Candidate of Engineering, Leningrad (1989). Yu. I. Mishchenko, A. R. Voídak, I. S. Berezin, et al., “Investigation of synthetic oil-cooled liquids for compressors in microcryogenic systems,” in: Investigation of Processes in Cryogenic Installations and Systems [in Russian], Cryogenic Machines Special Design Office (NPO “Kriogenmash”), Balashikha (1980), pp. 75–81. H. Shenk, Engineering Experimental Theory [Russian translation], Mir, Moscow (1972).