Tunable diode laser absorption spectroscopy (TDLAS) with merits of fast, sensitive, and nonintrusive has been used to measure the flow field temperature, gas composition, mass flux, and other quantities in a wide range of practical applications. For its in situ measurements, TDL sensors has been deployed in turbofan (PW6000) inlet, scramjet engine inlet, scramjet isolator/combustor for maintenance of engine performance.

© 2012 Optical Society of America

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