Nonintrusive nitric oxide density measurements in the effluent of core-heated airstreams

摘要: Transmittance measurements using an NO resonance source are reported for expanded arc-heated flow. The data used to deduce concentrations, which range from 0.17 1.9 percent by volume facility operating conditions with nozzle exit static temperatures 87 320 K. Absorption in the (0,1) band, not attributable a flow at thermal equilibrium, calculate nonequilibrium vibrational ranging 533 919 good agreement vibrational-temperature predictions of one-dimensional relaxation code, within uncertainties calculations and measured transmittance.