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

A. V. Novikov; Новиков А. В.; A. O. Obraz; Образ А. О.; D. A. Timokhin; Тимохин Д. А.

doi:10.31857/S0568528122600588

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

作者: Novikov A.V.¹^,2, Obraz A.O.¹^,2, Timokhin D.A.²
隶属关系:
1. Central Aerohydrodynamic Institute (TsAGI)
2. Moscow Institute of Physics and Technology
期: 编号 3 (2023)
页面: 69-76
栏目: Articles
URL: https://permmedjournal.ru/1024-7084/article/view/672375
DOI: https://doi.org/10.31857/S0568528122600588
EDN: https://elibrary.ru/NTEPQJ
ID: 672375

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详细

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 ${{e}^{N}}$ 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.

关键词

supersonic flows, injection, suction, linear stability theory

参考

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