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Computational and experimental investigation of supersonic convection over a laser-heated target

Marineau, Eric C. and Schetz, Joseph A. and Neel, Reece E. (2009) Computational and experimental investigation of supersonic convection over a laser-heated target. Journal of Thermophysics and Heat Transfer, 23 (3). pp. 502-512. ISSN 0887-8722.

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The cooling effect of a turbulent supersonic boundary layer over a laser-heated flat plate was investigated experimentally and numerically. Experiments were in the Virginia Polytechnic Institute and State University unheated supersonic wind tunnel at Mach 4. An absorbed laser power between 65 and 120 W was used, leading to a maximum heat flux between 10 and 19 MW/m(2) at the center of the 4-mm-diam Gaussian beam. The surface and backside temperature distributions were measured using a midwave infrared camera and type-K thermocouples. The GASP conjugate heat transfer algorithm coupling the Navier-Stokes and the solid conduction equations was used to simulate the experiments. The main experimental results were as follows: Asymmetry in the surface temperature increases with laser power. Maximum cooling near the beam center varies linearly with laser power, in which the proportionality constant corresponds to the ratio of convective cooling to laser heating. For both the 65 and 81 W cases, cooling is somewhat underpredicted at the surface near the center, but agreement improves with distance and on the backside.

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Additional Information:© 2009 American Institute of Aeronautics and Astronautics, Inc. Presented as Paper 4147 at the 39th AIAA Thermophysics Conference, Miami, FL, 25–28 July 2007; received 25 July 2007; revision received 19 February 2009; accepted for publication 20 February 2009. This work was funded by Arnold Engineering Development Center (AEDC) through the U.S. Air Force Small Business Innovation Research (SBIR) project under contract FA9101-04-C-0035.
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Air Force Office of Scientific Research (AFOSR)FA9101-04-C-0035
Issue or Number:3
Record Number:CaltechAUTHORS:20090808-142500783
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Usage Policy:No commercial reproduction, distribution, display or performance rights in this work are provided.
ID Code:14883
Deposited By: George Porter
Deposited On:03 Sep 2009 18:32
Last Modified:07 Oct 2019 23:25

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