Experimental research of the possibility of heat transfer enhancement in gas dynamic energy separation process

Abstract

Analysis of the mechanism of heat transfer enhancement in a device of machineless energy separation of flows (Leontiev tube) is presented in the paper. The main parameters that define the device's efficiency are the temperature recovery factor and heat transfer in the supersonic channel of the device. Changes in the shape and relief of the flow surface, the use of working fluids with a low Prandtl number, low-intensity shock waves and local separation areas in the supersonic channel are among the methods of heat transfer enhancement in an energy separation device. The results of experimental investigation of the influence of a supersonic separation flow on the adiabatic wall temperature and the temperature recovery factor are presented. The range of the Mach numbers analyzed is between 2 and 3.5. The Reynolds criterion along the length of the dynamic boundary layer amounts to at least 6·106. Field distributions of the adiabatic wall temperature and temperature recovery factors along the plate are presented for different Mach numbers. The results indicate that local separation boundary layer regions will probably intensify heat transfer in the supersonic channel of a gas dynamic energy separation device. The research has been conducted using the experimental facilities of the Institute of Mechanics of Lomonosov Moscow State University.

About the authors

S. S. Popovich

Lomonosov Moscow State University

Author for correspondence.
Email: pss1@mail.ru

Research Fellow of the Laboratory of Hypersonic Aerodynamics, Institute of Mechanics

Russian Federation

Yu. A. Vinogradov

Lomonosov Moscow State University

Email: vinograd@imec.msu.ru

Candidate of Science (Engineering), Associate Professor

Leading Researcher of the Laboratory of Hypersonic Aerodynamics, Institute of Mechanics

Russian Federation

M. M. Strongin

Lomonosov Moscow State University

Email: strongin@imec.msu.ru

Senior Researcher of the Laboratory of Hypersonic Aerodynamics, Institute of Mechanics

Russian Federation

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