Simultaneous multiple-point measurements of temperature in combustion gases are needed to test models describing combustion phenomena. Several schemes to measure temperature using laser- induced fluorescence (LIF) have recently been proposed.1–3 Our approach uses planar laser- induced fluorescence (PLIF) of the relatively stable species, nitric oxide (NO), which is added to the reactant gases at constant mole fraction. The laser-excited NO transition is chosen to produce a fluorescence signal which has a strong temperature dependence over the range of interest. This approach requires only one laser and yields temperature on a single-shot basis.
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