Gas Injection and Suction Effect on the Instability of a Supersonic Boundary Layer

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Resumo

We present the results of an investigation of the boundary layer stability on a flat plate having a region of gas injection/suction normal to the wall at a large supersonic freestream Mach number. The laminar flow past a flat plate having a region of distributed injection/suction of fixed intensity is modeled numerically using the integration of Navier—Stokes equations. The unstable disturbances in the boundary layer distorted by injection/suction are analyzed within the framework of the linear stability theory and the eN{{e}^{N}} method for compressible flows. High-frequency disturbances belonging to the plane second mode of the boundary layer, which are the most unstable at high velocities, are considered. It is shown that gas injection/suction leads to a nonmonotonic variation of disturbance growth rates with the appearance of stabilization/destabilization regions, as compared with the case in which injection/suction is absent.

Sobre autores

A. Novikov

Central Aerohydrodynamic Institute (TsAGI); Moscow Institute of Physics and Technology

Email: novikov.av@mipt.ru
Zhukovsky, Russia; Dolgoprudny, Russia

A. Obraz

Central Aerohydrodynamic Institute (TsAGI); Moscow Institute of Physics and Technology

Email: obraz.ao@mipt.ru
Zhukovsky, Russia; Dolgoprudny, Russia

D. Timokhin

Moscow Institute of Physics and Technology

Autor responsável pela correspondência
Email: timokhin.da@phystech.edu
Dolgoprudny, Russia

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Declaração de direitos autorais © А.В. Новиков, А.О. Образ, Д.А. Тимохин, 2023

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