Abstract
Planar laser-induced fluorescence (PLIF) imaging of nitric oxide (NO) is performed for a symmetrical wedge placed within a hypervelocity jet. The flow contains significant concentrations of species that contribute to the collisional quenching of the NO fluorescence. An attached shock at the tip of the wedge elevates the pressure and temperature to conditions where quenching rates are increased considerably. The flow downstream of this shock is perturbed by an expansion fan emanating from the shoulder of the wedge, which reduces the temperature and pressure, producing a non-uniform region, in which collisional rates decrease significantly. The pressure and temperature are: 7.5 kPa and 300 K in the jet, 200 kPa and 1760 K behind the shock, and 18 kPa and 890 K behind the expansion fan, respectively.
© 1996 Optical Society of America
PDF ArticleMore Like This
TJ McIntyre, AFP Houwing, PC Palma, and J Fox
MK2 International Quantum Electronics Conference (IQEC) 1996
P. H. PAUL, J. M. SEITZMAN, L. M. COHEN, B. K. McMILLIN, and R. K. Hanson
THC1 Conference on Lasers and Electro-Optics (CLEO:S&I) 1988
Jorge Luque, Masayuki Tamura, Joel E. Harrington, Gregory P. Smith, David R. Crosley, and Jay B. Jeffries
LThD.5 Laser Applications to Chemical and Environmental Analysis (LACSEA) 1996