On Profiling of the Working Cavity of the Second Stage in a Hybrid Piston Volumetric Power Machine

• Published in: Chemical and petroleum engineering 2020-05, Vol.56 (1-2), p.125-136
• Main Authors: Shcherba, V. E., Shalai, V. V., Pustovoi, N. V., Zanin, A. V.
• Format: Article
• Language: English
• Subjects: Chemistry; Chemistry and Materials Science; Compressors; Conical bodies; Cylinders; Geotechnical Engineering & Applied Earth Sciences; Heat exchange; Heat exchangers; Industrial Chemistry/Chemical Engineering; Industrial Pollution Prevention; Mineral Resources; Pipeline Fittings; Pumps
• ISSN: 0009-2355; 1573-8329
• DOI: 10.1007/s10556-020-00749-0

Different methods of profiling the working cavity of the second stage of a volumetric hybrid piston power machine are considered. Profiling of the working chamber in order to achieve a constant velocity of the liquid piston and attain the maximal magnitude of the heat-exchange surface, as well as profiling of the surface of a working chamber consisting of a cone and cylinder are performed. Computational formulas in analytic form are obtained in order to create a profiled surface that satisfies the first two conditions. For the third condition criteria for estimating the efficiency relative to the maximal magnitude of the heat-exchange surface and relative to the deviation of the velocity of the liquid piston from some constant velocity of the liquid in the working chamber are developed. As a result of a numerical experiment forms of the working chamber that satisfy the first two conditions are established and it is proved that a conical surface is best for a working chamber consisting of a cone and cylinder.