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<p>The paper presents experimental results on the influence of weak shock waves on the development of controlled disturbances in a supersonic boundary layer on a flat plate with a Mach number equal 2.0. Results were obtained using constant-temperature anemometry method. A pair of shock waves in the incoming flow are generated by 150×7×0.13-mm 2D surface irregularity provided on the side wall of the T-325 wind tunnel (available at ITAM SB RAS). Controllable disturbances were generated in a flow by a high-frequency glow discharge within the chamber inside the model. Interacting from pair weak shock waves with the leading edge of plate creates a stationary wake in the boundary layer where controllable pulsations are generated.</p><p>The paper focuses on a weak-nonlinear regime of evolution for controllable disturbances under conditions of a distorted wake of a flat plate and a uniform boundary layer. The characteristics of disturbance waves were analyzed. A method for evaluating dispersion ratio was developed. The paper compared experimental data with computation results. Numerical computations were performed using the linear stability theory under the uniform boundary-layer conditions.</p>

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On wave characteristics of controlled disturbances in a boundary layer with impact of a pair of weak shock waves

  • 期刊论文

  • 发表日期：

    2025年7月1日

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  • Yu. G. Ermolaev,
  • A. D. Kosinov,
  • L. V. Afanasiev,
  • M. V. Piterimova

摘要

The paper presents experimental results on the influence of weak shock waves on the development of controlled disturbances in a supersonic boundary layer on a flat plate with a Mach number equal 2.0. Results were obtained using constant-temperature anemometry method. A pair of shock waves in the incoming flow are generated by 150×7×0.13-mm 2D surface irregularity provided on the side wall of the T-325 wind tunnel (available at ITAM SB RAS). Controllable disturbances were generated in a flow by a high-frequency glow discharge within the chamber inside the model. Interacting from pair weak shock waves with the leading edge of plate creates a stationary wake in the boundary layer where controllable pulsations are generated.

The paper focuses on a weak-nonlinear regime of evolution for controllable disturbances under conditions of a distorted wake of a flat plate and a uniform boundary layer. The characteristics of disturbance waves were analyzed. A method for evaluating dispersion ratio was developed. The paper compared experimental data with computation results. Numerical computations were performed using the linear stability theory under the uniform boundary-layer conditions.