Measurement techniques based on laser induced fluorescence (LIF) are among the newest measurement techniques. The first successful application of fluorescence imaging was reported in 1982. Despite this short history LIF techniques have been developed into very powerful and the most widely used non-intrusive techniques for measurements in gases. This is mainly due to their high signal strength compared to the main competitors (i.e. Rayleigh and Raman scattering) as shown in Chap. 9 (Techniques Based on Light Scattering) of this book, which generally make two-dimensional measurements with excellent time and space resolution possible. The principal applications of LIF are the measurement of minority species concentrations and temperatures. In special arrangements of the probe, however, also pressure and velocity distributions have been obtained by fluorescence measurements.
KeywordsFlame Front Vibrational Level Laser Induce Fluorescence Minority Species Collisional Quenching
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