Abstract

A single-pulse, laser-induced-fluorescence diagnostic for the measurement of two-dimensional temperature fields in combustion flows is described. The method uses sheet illumination from a tunable laser to excite planar laser-induced fluorescence in a stable tracer molecule, seeded at constant mole fraction into the flow field. The temporal resolution of this technique is determined by the laser pulse length. Experimental results are presented for a rod-stabilized, premixed methane–air flame, using the Q₁(22) line of the nitric oxide A₂ ∑⁺(v = 0) ← X ²Π_1/2(v = 0) transition (λ ≃ 225.6 nm).

© 1985 Optical Society of America

Temperature measurements in gases by use of planar laser-induced fluorescence imaging of NO

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