Effect of laser supported detonation wave confinement on termination conditions |
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| Authors: | Masato Ushio Kimiya Komurasaki Koichi Kawamura Yoshihiro Arakawa |
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| Institution: | (1) Department of Advanced Energy, The University of Tokyo, Kashiwanoha 5-1-5, Kashiwa, Chiba 277-8561, Japan;(2) Department Aeronautics and Astronautics, The University of Tokyo, Hongo 7-3-1, Bunkyo, Tokyo 113-8656, Japan |
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| Abstract: | A laser supported detonation (LSD) wave was driven using line-focusing laser optics, in which an induced blast wave expanded
laterally from the LSD region to surrounding air in two-dimensional space. The LSD wave was confined in quasi-1D space using
a wedge nozzle to restrict the lateral expansion of a blast wave. The LSD termination threshold and the blast wave energy
were deduced from shadowgraphs showing the blast wave expansion. The respective threshold laser intensities for cases with
and without confinement were estimated as 17 and 34 GW/m2, indicating that the lateral expansion strongly influenced on the LSD termination condition.
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| Keywords: | Laser Blast wave Detonation Propulsion |
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