Study on the interaction mechanism of pulsed laser and normal shock

Jilin Shi; Diankai Wang; Ming Wen

doi:10.1117/12.2584122

2 December 2020 Study on the interaction mechanism of pulsed laser and normal shock

Jilin Shi, Diankai Wang, Ming Wen

Proceedings Volume 11717, 24th National Laser Conference & Fifteenth National Conference on Laser Technology and Optoelectronics; 117170B (2020) https://doi.org/10.1117/12.2584122
Event: 24th National Laser Conference & Fifteenth National Conference on Laser Technology and Optoelectronics, 2020, Shanghai, China

Abstract

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.

Citation Download Citation

Jilin Shi, Diankai Wang, and Ming Wen "Study on the interaction mechanism of pulsed laser and normal shock", Proc. SPIE 11717, 24th National Laser Conference & Fifteenth National Conference on Laser Technology and Optoelectronics, 117170B (2 December 2020); https://doi.org/10.1117/12.2584122

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