Abstract
A technique suitable for measuring fluctuating temperatures in supersonic turbulent flows of N2 seeded with NO has been demonstrated in a nonflowing cell. The method relies on the two-photon excitation of two selected rovibronic transitions in the NO γ(A2∑+, υ′ = 0 ← X2Π, υ″ = 0) band. Measurements between 155 and 295 K in N2 mixtures containing 300 parts in 106 NO were obtained with single-pulse errors below 4% rms.
© 1983 Optical Society of America
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