Influence of the parameters of supersonic flow on effectiveness of gazdynamic method of temperature separation

• Published in: Journal of physics. Conference series 2017-11, Vol.891 (1), p.12079
• Main Authors: Zditovets, A G, Vinogradov, Yu A, Strongin, M M, Kiselev, N A
• Format: Article
• Language: English
• Subjects: Air flow; Boundary layers; Compressible flow; Flow control; Flow velocity; Heat; Heat transfer; Heat transmission; Intensifiers; Mach number; Physics; Prandtl number; Process parameters; Separation; Subsonic flow; Supersonic flow
• ISSN: 1742-6588; 1742-6596
• DOI: 10.1088/1742-6596/891/1/012079

The process of energy (temperature) separation in an airflow is experimentally investigated in a device consisting of two coaxial channels with heat-conducting walls. The air flows at a supersonic velocity along the inner channel and at a subsonic velocity in the outer channel. The initial total temperatures of the flows are the same. Heat transfer arises due to the energy separation effect in the boundary layer of the compressible flow with Prandtl number is not equal to unity. The parameters varied in the process of investigation are the initial flow temperature, the supersonic flow velocity (Mach number), the mass fraction of the subsonic flow, the scheme of the flow organization in the device, and the presence/absence of heat transfer intensifiers in the subsonic channel. In all the regimes considered the subsonic flow cooling and the supersonic flow heating were fixed. The total pressure of the subsonic flow was almost conserved in the maximum cooling regimes. The flow parameters that have an effect on the temperature separation efficiency are determined.