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Triggering Shock Wave Positions by Patterned Energy Deposition

Author

Listed:
  • Philip Andrews

    (Department of Aerospace and Mechanical Engineering, Institute for Flow Physics and Control, University of Notre Dame, South Bend, IN 46637, USA)

  • Philip Lax

    (Department of Aerospace and Mechanical Engineering, Institute for Flow Physics and Control, University of Notre Dame, South Bend, IN 46637, USA)

  • Sergey Leonov

    (Department of Aerospace and Mechanical Engineering, Institute for Flow Physics and Control, University of Notre Dame, South Bend, IN 46637, USA)

Abstract

The problem considered in this work is shock wave (SW) positioning control in shock-dominated flows. Experiments are conducted to investigate the triggering effect of patterned near-surface electrical discharges on SW reflection from plane walls. In the wind tunnel, M = 4 , P 0 = 4 bar, a solid wedge SW generator is mounted on the upper wall. Q-DC filamentary electrical discharges were arranged on the opposite wall, so that the SW from the wedge impinged on the plasma filaments that are arranged flow-wise in either a row of three or a single central filament. Within the supersonic flow, narrow subsonic areas are actuated by electrical discharge thermal deposition, resulting in pressure redistribution, which, in turn, relocates the reflection of impinging SW to a predefined position. Mie scattering, schlieren imaging, and wall pressure measurements are used to explore the details of plasma-SW interaction. Using Mie scattering, the three-dimensional shape of the SW structure is mapped both before and after electrical discharge activation. Plasma-based triggering mechanisms are described in terms of the physical principles of flow control and a criterion for determining the effectiveness of the flowfield control.

Suggested Citation

  • Philip Andrews & Philip Lax & Sergey Leonov, 2022. "Triggering Shock Wave Positions by Patterned Energy Deposition," Energies, MDPI, vol. 15(19), pages 1-15, September.
    • Handle: RePEc:gam:jeners:v:15:y:2022:i:19:p:7104-:d:926848
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    Citations

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    Cited by:

    1. Olga A. Azarova, 2022. "Basics of Control of the Bow Shock Wave, Drag and Lift Forces, and Stability in a Steady Supersonic Flow Past an AD Body Using Permanently Operating Thermally Stratified Energy Deposition," Energies, MDPI, vol. 15(22), pages 1-31, November.
    2. Olga A. Azarova & Oleg V. Kravchenko, 2024. "The Use of Spatially Multi-Component Plasma Structures and Combined Energy Deposition for High-Speed Flow Control: A Selective Review," Energies, MDPI, vol. 17(7), pages 1-39, March.

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