TsAGI Science Journal
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ISSN Печать: 1948-2590
ISSN Онлайн: 1948-2604
EFFECT OF EXTERNAL UNSTEADY THERMAL PERTURBATIONS ON THE AIRCRAFT ENGINE STABILITY
Том 45,
Выпуск 5, 2014,
pp. 463-478
DOI: 10.1615/TsAGISciJ.2014012228
Краткое описание
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.
Ключевые слова: boundary layer, thickness, pressure gradient, viscosity, friction stress, separation, velocity
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