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Coherent anti-stokes raman spectroscopy (CARS) and laser-induced fluorescence (LIF) measurements in a rocket engine plume☆ by D.R. Williams; D. Mckeown; F.M. Porter; C.A. Baker; A.G. Astill; K.M. Rawley is a Engineering article available to read on EtoBox.

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Coherent anti-Stokes raman spectroscopy (CARS) and laser-induced fluorescence (LIF) measurements in the plume of a liquid-fueled rocket engine are compared with the results predicted by a mathematical model of the plume. Single-shot CARS nitrogen thermometry extensively mapped the temperature profile of the plume. At most positions, high signal success rates were obtained. Success rates were lower during initial runs, while the system was optimized for operation in the rocket environment, and on axis close to the nozzle where the probing laser beams were severely deflected by the plume. For each position studied, the spectra taken were fitted for temperature and a mean temperature and standard deviation calculated from the results. The mean temperatures were compared with predicted temperature values obtained from a marching procedure parabolic computer program. CARS spectra from water vapor in the plume were also recorded and fitted for temperature and concentration. Excellent agreement between theory and experiment was obtained. Results showed a strong positive correlation between water vapor concentration and temperature at each measurement position--some contributions to this m

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Author

D.R. Williams; D. Mckeown; F.M. Porter; C.A. Baker; A.G. Astill; K.M. Rawley

Publisher

Elsevier Science; Elsevier ; Elsevier BV (ISSN 0010-2180)

Published

1993

Language

EN

Field

Engineering (Physical Sciences)