An experimental study was conducted to investigate the drag reduction by laser‐plasma energy addition in a low density Mach 7 hypersonic flow. The experiments were conducted in a shock tunnel and the optical beam of a high power pulsed TEA laser operating with 7 J of energy and 30 MW peak power was focused to generate the plasma upstream of a hemispherical model installed in the tunnel test section. The non‐intrusive schlieren optical technique was used to visualize the effects of the energy addition to hypersonic flow, from the plasma generation until the mitigation of the shock wave profile over the model surface. Aside the optical technique, a piezoelectric pressure transducer was used to measure the impact pressure at stagnation point of the hemispherical model and the pressure reduction could be observed.
Drag Reduction by Laser‐Plasma Energy Addition in Hypersonic Flow
BEAMED ENERGY PROPULSION: Fifth International Symposium on Beamed Energy Propulsion ; 2007 ; Kailua‐Kona (Hawaii)
AIP Conference Proceedings ; 997 , 1 ; 379-389
2008-04-28
11 pages
Conference paper
Electronic Resource
English
Drag Reduction by Laser-plasma Energy Addition in Hypersonic Flow
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