Results are presented of analytical and experimental investigations to determine the feasibility of using coherent anti-Stokes Raman spectroscopy (CARS) to measure temperature and species concentrations in supersonic combustion experiments. Experimental CARS spectra of O2 and H2 in a laboratory flat H2 - air diffusion flame are presented. Temperatures deduced from both species generally agree with radiation corrected thermocouple measurements. Oxygen concentrations were determined from the shape of the experimental spectra. Measured H2 CARS signal magnitudes are in good agreement with analytical predictions based on H2 concentration profiles determined from spontaneous Raman scattering. Based on these results, CARS diagnostics appear to be feasible if problems associated with the supersonic flow are not too severe.
Investigation of the feasibility of CARS measurements in scramjet combustion
1979-12-01
Conference paper
No indication
English
Application of CARS to scramjet combustion
NTRS | 1987
|Velocity and Temperature Measurements in a Scramjet Combustion Chamber
British Library Conference Proceedings | 1997
|Wiley | 2022
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