With the currently growing interest for advanced technologies to enable hypersonic flight comes the Direct Energy Air Spike concept, where pulsed beamed laser energy is focused upstream of a blunt flight vehicle to disrupt the flow structure creating a virtual, slender body geometry. This allies in the vehicle both advantages of a blunt body (lower thermal stresses) to that of a slender geometry (lower wave drag). The research conducted at the Henry T. Nagamatsu Laboratory for Aerodynamics and Hypersonics focused on the measurement of the surface pressure and heat transfer rates on a blunt model. The hypersonic flight conditions were simulated at the HTN Laboratory's 0.3 m T2 Hypersonic Shock Tunnel. During the tests, the laser energy was focused upstream the model by an infrared telescope to create the DEAS effect, which was supplied by a TEA laser. Piezoelectric pressure transducers were used for the pressure measurements and fast response coaxial thermocouples were used for the measurement of surface temperature, which was later used for the estimation of the wall heat transfer using the inverse heat conduction theory.
Surface Heat Flux and Pressure Distribution on a Hypersonic Blunt Body With DEAS
BEAMED ENERGY PROPULSION: Fifth International Symposium on Beamed Energy Propulsion ; 2007 ; Kailua‐Kona (Hawaii)
AIP Conference Proceedings ; 997 , 1 ; 367-378
2008-04-28
12 pages
Conference paper
Electronic Resource
English
Surface Heat Flux and Pressure Distribution on a Hypersonic Blunt Body with DEAS
British Library Conference Proceedings | 2008
|Multi Laser Pulse Investigation of the DEAS Concept in Hypersonic Flow
American Institute of Physics | 2004
|Brazilian Activities On The Laser‐Supported DEAS In Hypersonic Flow
American Institute of Physics | 2003
|Stagnation heat flux estimation in spherically blunt axisymmetric hypersonic models
SAGE Publications | 2023
|Transpiration Cooling Of Hypersonic Blunt Body
NTRS | 1991
|