13 March 2012 Numerical study on deceleration of type IV shock interaction thermal ablating effect by laser energy injection
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Abstract
The wave structures of type IV shock interaction will be changed when injected laser energy, and it can decelerate the type IV shock interaction thermal ablating effect on the blunt body by laser energy injection. A high resolution numerical method based on finite volume method and domain decomposition of structural grid is used to compute the influence of laser single pluse energy and laser continuous energy injected into type IV shock interaction at Mach number 3.45.The result shows that the pressure and temperature on the blunt body surface will be increase slightly when injected laser energy with single pluse in a relatively short period(50μs to 60μs ),then it will be decreased quickly, and it will be restored to the original state at last. The pressure and temperature on the blunt body surface will be increased slightly when injection a little laser energy with continuous and decreased with the increase of the injected laser energy, but the temperature on the blunt body surface will be increased quickly when the injection laser energy over 160kW.
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Wentang Wu, Yangji Hong, Juan Fang, "Numerical study on deceleration of type IV shock interaction thermal ablating effect by laser energy injection", Proc. SPIE 8330, Photonics and Optoelectronics Meetings (POEM) 2011: Laser and Terahertz Science and Technology, 833010 (13 March 2012); doi: 10.1117/12.918854; https://doi.org/10.1117/12.918854
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