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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