Numerical simulation for the influence of laser-induced plasmas addition on air mass capture of hypersonic inlet

Wei Zhao; Zhiguo Dou; Qian Li

doi:10.1117/12.918836

13 March 2012 Numerical simulation for the influence of laser-induced plasmas addition on air mass capture of hypersonic inlet

Wei Zhao, Zhiguo Dou, Qian Li

Author Affiliations +

Proceedings Volume 8330, Photonics and Optoelectronics Meetings (POEM) 2011: Laser and Terahertz Science and Technology; 83300W (2012) https://doi.org/10.1117/12.918836
Event: Photonics and Optoelectronics Meetings 2011, 2011, Wuhan, China

Abstract

The theory of laser-induced plasmas addition to hypersonic airflow off a vehicle to increase air mass capture and improve the performance of hypersonic inlets at Mach numbers below the design value is explored. For hypersonic vehicles, when flying at mach numbers lower than the design one, we can increase the mass capture ratio of inlet through laser-induced plasmas injection to the hypersonic flow upstream of cowl lip to form a virtual cowl. Based on the theory, the model of interaction between laser-induced plasmas and hypersonic flow was established. The influence on the effect of increasing mass capture ratio was studied at different positions of laser-induced plasmas region for the external compression hypersonic inlet at Mach 5 while the design value is 6, the power of plasmas was in the range of 1-8mJ. The main results are as follows: 1. the best location of the plasma addition region is near the intersection of the nose shock of the vehicle with the continuation of the cowl line, and slightly below that line. In that case, the shock generated by the heating is close to the shock that is a reflection of the vehicle nose shock off the imaginary solid surface-extension of the cowl. 2. Plasma addition does increase mass capture, and the effect becomes stronger as more energy is added, the peak value appeared when the power of plasma was about 4mJ, when the plasma energy continues to get stronger, the mass capture will decline slowly.

Citation Download Citation

Wei Zhao, Zhiguo Dou, and Qian Li "Numerical simulation for the influence of laser-induced plasmas addition on air mass capture of hypersonic inlet", Proc. SPIE 8330, Photonics and Optoelectronics Meetings (POEM) 2011: Laser and Terahertz Science and Technology, 83300W (13 March 2012); https://doi.org/10.1117/12.918836

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KEYWORDS

Plasmas

Laser induced plasma spectroscopy

Solids

Picosecond phenomena

Nose

Throat

Numerical simulations

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