Abstract

It is very important for I₂–planar laser-induced fluorescence measurement of temperature in a compressible flow to choose a pair of absorption lines appropriate to the temperature range. The method for selection of suitable pairs of absorption lines of I₂ in the transition of B ³Π_ou⁺(ν′ = 43) ← X ¹Σ_g⁺ (ν″ = 0) is described. By the use of many pairs of absorption lines, the temperature dependence of the ratio between the fluorescence signals is calculated theoretically and is also investigated in experiments in which several pairs are applied to determination of the temperature distribution of a supersonic free jet.

© 1995 Optical Society of America

Method for planar measurement of temperature in compressible flow using two-line laser-induced iodine fluorescence

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