High-Turbulent Gas Screen in a Supersonic Nozzle

V. P. Lebedev; V. V. Lemanov; Viktor I. Terekhov

doi:10.1615/HeatTransRes.v31.i6-8.70

Heat Transfer Research

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ISSN Druckformat: 1064-2285

ISSN Online: 2162-6561

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High-Turbulent Gas Screen in a Supersonic Nozzle

Volumen 31, Ausgabe 6-8, 2000, pp. 419-427

DOI: 10.1615/HeatTransRes.v31.i6-8.70

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V. P. Lebedev
S. S. Kutateladze Institute of Thermophysics of the Siberian Branch of the Russian Academy of Sciences, Novosibirsk, Russia

V. V. Lemanov
Institute of Thermophysics, Siberian Branch of the Russian Academy of Sciences, Novosibirsk, Russia

Viktor I. Terekhov
Kutateladze Institute of Thermophysics, Laboratory of Thermal and Gas Dynamics, Russian Academy of Sciences, Siberian Branch, 630090,1, Acad. Lavrent'ev Avenue, Novosibirsk, Russia; Novosibirsk State Technical University, K. Markx av., 20, Novosibirsk, 630073, Russia

ABSTRAKT

An effect of initial turbulence of the flow on characteristics of a gas screen in the Laval nozzle is studied experimentally. The effect of flow acceleration on turbulence behavior is considered, the distribution of turbulence is compared with the theory of rapid transformation. The distribution of static pressure, adiabatic temperature of a wall, coefficient of recovery, and the parameter of gas screen efficiency along the nozzle length is measured. An integral method is suggested for calculation of the efficiency of screen cooling on the calculated flow modes in the nozzle. The method allows for a longitudinal pressure gradient, compressibility, nonisothermicity and degree of flow turbulence.

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