Flow visualization in combustion gases using nitric oxide fluorescence

Kychakoff et al. (1982) have reported a new technique for quantitative, simultaneous multiple-point measurements of the OH concentration in flames. The technique involves an imaging of planar laser-induced fluorescence (PLIF). In the present investigation, attention is given to a further extension of the technique, making use of NO fluorescence. The considered work was partially motivated by the desire to investigate the suitability of NO as a seed material for visualizing species concentration and temperature (for example in mixing studies). PLIF with an array imaging system is used to visualize NO in combustion flowfields with submillimeter and submicrosecond resolution.