Boundary-Layer Separation Control Using Laser-Induced Air Breakdown

Bright, Alfram V.; Tichenor, Nathan R.; Kremeyer, Kevin; Wlezien, R. W.

doi:10.2514/1.j055272

Cited by 8 publications

(3 citation statements)

References 29 publications

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“…The effects of laser-induced plasma on the low-speed separating boundary layer over a laminar airfoil have also been investigated experimentally. 136 In this application, the laser discharge is focused just upstream of the leading edge of the airfoil which creates a high-temperature, low-density bubble that expands and creates a shock wave and a coherent zone of heated and highly turbulent air. As the authors report, the hot, low-density fluid induced significant exchange of momentum between the freestream and the incipient separation zone, leading to the reattachment of the flow for a period lasting seven orders of magnitude longer than the plasma lifetime.…”

Section: Classification and Description Of Flow Control Methodsmentioning

confidence: 99%

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Current state and future trends in boundary layer control on lifting surfaces

Svorcan

Wang

Griffin

2022

Advances in Mechanical Engineering

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Successful flow control may bring numerous benefits, such as flow stabilization, flow reattachment, separation delay, drag reduction, lift increase, aerodynamic performance improvement, energy efficiency increase, shock delay or weakening, noise reduction, etc. For these purposes, many different flow control devices, which can be classified as passive, semi-active and active, have been designed and tested. This review paper aims to highlight the most promising and commonly employed boundary layer control methods as well as outline their potential in specific applications in aerospace and energy engineering. Referenced studies, performed on various geometries (flat plates, channels, airfoils, wings, blades, cylinders), are primarily numerical or experimental. Although enhanced aerodynamic performance is achieved in many cases, further research is required to draw general conclusions. This paper aims to demonstrate that, in the future, we may expect further developments of flow control actuators, as well as their increased application.

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Section: Classification and Description Of Flow Control Methodsmentioning

confidence: 99%

“…Additional research [135][136][137] includes somewhat unconventional examples of plasma actuator applications, in which plasma is induced by different methods than previously covered. Possibilities of controlling the subsonic vortex flow appearing around a cone at nonzero AoA is experimentally explored.…”

Section: Active Flow Controlmentioning

confidence: 99%

Current state and future trends in boundary layer control on lifting surfaces

Svorcan

Wang

Griffin

2022

Advances in Mechanical Engineering

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“…In [223], the effect of pulsed optical discharge near the leading edge of an airfoil on the boundary layer separation at zero angle of attack was investigated. A laser spark was generated across the leading edge of the airfoil and the flow, forming a region of highly heated gas immediately in front of the model.…”

Section: Flow Separation Control Using Pulsed Energy Releasementioning

confidence: 99%

Gasdynamic Flow Control by Ultrafast Local Heating in a Strongly Nonequilibrium Pulsed Plasma

Starikovskiy

Aleksandrov

2021

Plasma Phys. Rep.

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Abstract— The paper presents a review of modern works on gasdynamic flow control using a highly nonequilibrium pulsed plasma. The main attention is paid to the effects based on ultrafast (on the nanosecond time scale for atmospheric pressure) local gas heating, since, at present, the main successes in controlling high-speed flows by means of gas discharges are associated with this thermal mechanism. Attention is paid to the physical mechanisms responsible for the interaction of the discharge with gas flows. The first part of the review outlines the most popular approaches for pulsed energy deposition in plasma aerodynamics: nanosecond surface barrier discharges, pulsed spark discharges, and femto- and nanosecond optical discharges. The mechanisms of ultrafast heating of air at high electric fields realized in these discharges, as well as during the decay of the discharge plasma, are analyzed separately. The second part of the review gives numerous examples of plasma-assisted control of gasdynamic flows. It considers control of the configuration of shock waves in front of a supersonic object, control of its trajectory, control of quasi-stationary separated flows and layers, control of a laminar–turbulent transition, and control of static and dynamic separation of the boundary layer at high angles of attack, as well as issues of the operation of plasma actuators in different weather conditions and the use of plasma for the de-icing of a flying object.

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Plasma Aerodynamics and Flow Control by Superfast Local Heating

Starikovskiy

Aleksandrov

2023

Springer Series in Plasma Science and Technology

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Boundary-Layer Separation Control Using Laser-Induced Air Breakdown

Cited by 8 publications

References 29 publications

Current state and future trends in boundary layer control on lifting surfaces

Current state and future trends in boundary layer control on lifting surfaces

Gasdynamic Flow Control by Ultrafast Local Heating in a Strongly Nonequilibrium Pulsed Plasma

Plasma Aerodynamics and Flow Control by Superfast Local Heating

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