Mr. Jilin Shi Profile

Jilin Shi

at Aerospace Engineering Univ

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Proceedings Article | 2 December 2020 Paper

Study on the interaction mechanism of pulsed laser and normal shock

Jilin Shi, Diankai Wang, Ming Wen

Proceedings Volume 11717, 117170B (2020) https://doi.org/10.1117/12.2584122

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The deposition of laser energy will ionize the air and generate high-temperature and low-density plasma hot core. The interaction of laser-induced plasma with quiescent air and shock waves can change the flow structure, which will change the local pressure. The evolution of the plasma hot core in the quiescent air and the interaction of the hot core and the normal shock at Mach number 1.75 are numerically simulated. The results show that the hot core evolves into a threelobed structure in quiescent air due to the Richtmyer-Meshkov instability; The baroclinic pressure gradient caused by the interaction of shock wave and the hot core boundary leads to the splitting of the hot core into two vortex rings, which are the key reason of the change of the flow field caused by laser.

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