Development of disturbances generated by an electric discharge in the shock wave / boundary layer interaction zone

IF 0.5 4区工程技术 Q4 ENGINEERING, AEROSPACE Thermophysics and Aeromechanics Pub Date : 2024-01-03 DOI:10.1134/S0869864323040078

O. I. Vishnyakov, P. A. Polivanov, A. A. Sidorenko, A. D. Budovsky

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Abstract

The paper presents the results of experimental study of disturbances generated by an electric discharge. Observations are carried out in the zone of interaction of a shock wave and a boundary layer (the incident shock wave has the Mach number M = 1.43). Experiments were carried out in a supersonic wind tunnel with the unit Reynolds number Re1 = 11·10⁶ 1/m. The flow velocity was measured using the PIV method and hot-wire method. The artificial disturbances are generated by a periodic pulsed electric discharge; the discharge is allocated at the model surface upstream of the interaction zone. The discharge time is less than 100 ns: this enables creating a broadband disturbance inside the boundary layer. The method of phase-locked measurement with the ensemble averaging of realizations produces the spatial and temporal characteristics of disturbances generated in the interaction zone. The major growth of initial disturbances occurs in the shear layer behind the shock wave/boundary layer interaction zone (here the flow becomes turbulent).

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冲击波/边界层相互作用区放电产生的扰动的发展情况

本文介绍了对放电产生的扰动进行实验研究的结果。观测是在冲击波和边界层（入射冲击波的马赫数 M = 1.43）相互作用区进行的。实验在超音速风洞中进行，单位雷诺数为 Re1 = 11-106 1/m。流速测量采用 PIV 法和热线法。人工扰动由周期性脉冲放电产生；放电分布在相互作用区上游的模型表面。放电时间小于 100 毫微秒：这样就能在边界层内产生宽带干扰。采用锁相测量法和集合平均实现法可以得出相互作用区产生的扰动的空间和时间特征。初始扰动的主要增长发生在冲击波/边界层相互作用区后面的剪切层（这里的流动变得湍急）。

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来源期刊

Thermophysics and Aeromechanics THERMODYNAMICS-MECHANICS

CiteScore

0.90

自引率

40.00%

发文量

审稿时长

>12 weeks

期刊介绍： The journal Thermophysics and Aeromechanics publishes original reports, reviews, and discussions on the following topics: hydrogasdynamics, heat and mass transfer, turbulence, means and methods of aero- and thermophysical experiment, physics of low-temperature plasma, and physical and technical problems of energetics. These topics are the prior fields of investigation at the Institute of Thermophysics and the Institute of Theoretical and Applied Mechanics of the Siberian Branch of the Russian Academy of Sciences (SB RAS), which are the founders of the journal along with SB RAS. This publication promotes an exchange of information between the researchers of Russia and the international scientific community.