Schlieren Visualization Technique Applied to the Study of Laser-Induced Breakdown in Low Density Hypersonic Flow

Journal Article · Tue May 02 04:00:00 EDT 2006 · AIP Conference Proceedings

DOI:https://doi.org/10.1063/1.2203293· OSTI ID:20800251

Oliveira, A C ^[1]; Minucci, M A. S.; Toro, P G. P.; Chanes, Jr, J B ^[2]; Salvador, I I ^[3]; Myrabo, L N; Nagamatsu, H T ^[4]

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1. Laboratorio Associado de Combustao e Propulsao INPE, Caixa Postal 01 12630-000 Cachoeira Paulista, SP. (Brazil)
2. Laboratory of Aerothermodynamics and Hypersonics, IEAv-CTA, Sao Jose dos Campos - SP 12228-840 (Brazil)
3. Laboratorio Associado de Combustao e Propulsao INPE, Caixa Postal 01 12630-000 Cachoeira Paulista, SP (Brazil)
4. Department of Mechanical, Aerospace, and Nuclear Engineering. Rensselaer Polytechnic Institute (RPI), Troy, NY (United States)

Experimental results on the visualization of the time evolution of the laser-plasma induced breakdown produced in low density hypersonic flow using the Schlieren technique are presented. The plasma was generated by focusing the high power laser pulse of a CO2 TEA laser in the test section of the IEAv 0.3m Hypersonic Shock Tunnel. An ultra-high speed electronic tube camera was used to register the event. The photographs reveal the expansion of the shock wave produced by the laser generated hot plasma and the convection of the plasma kernel by the hypersonic flow. It is also observed the interaction between the plasma disturbed region and the shock established by the flow around an hemisphere-cylinder model. A strong change in the shock wave structure near the model was observed, corroborating the DEAS concept.

• OSTI ID: 20800251
• Journal Information: AIP Conference Proceedings, Journal Name: AIP Conference Proceedings Journal Issue: 1 Vol. 830; ISSN APCPCS; ISSN 0094-243X
• Country of Publication: United States
• Language: English

Related Subjects

70 PLASMA PHYSICS AND FUSION TECHNOLOGY
BREAKDOWN
CARBON DIOXIDE LASERS
CONVECTION
DENSITY
FLOW VISUALIZATION
HOT PLASMA
HYPERSONIC FLOW
LASER RADIATION
PHOTOGRAPHY
PLASMA DIAGNOSTICS
PLASMA EXPANSION
PLASMA HEATING
PLASMA PRODUCTION
PULSES
SHOCK WAVES