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TsAGI Science Journal

ISSN Imprimir: 1948-2590
ISSN En Línea: 1948-2604

TsAGI Science Journal

DOI: 10.1615/TsAGISciJ.2014012228
pages 463-478

EFFECT OF EXTERNAL UNSTEADY THERMAL PERTURBATIONS ON THE AIRCRAFT ENGINE STABILITY

Leonid Dmitrievich Kolesinsky
Central Aerohydrodynamic Institute (TsAGI) 1, Zhukovsky str., Zhukovsky, 140180, Moscow region, Russia

SINOPSIS

Non-isothermal turbulent gas flows in the engine channels are analyzed. Analytic expression for estimation of thermal and dynamic boundary layers at unsteady flow in the wall area is proposed based on the typical time scales. The dependence of the critical value of the inlet air heating that causes unsteady engine performance on the rate of temperature increase and presence of the extreme point corresponding to the minimum value of heating is explained from the physical viewpoint.


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