Abstract
Broadband single pulse coherent anti-Stokes Raman scattering (CARS) experiments employing a folded box phase matching geometry in a shock tunnel flow are presented. Rovibrational spectra of molecular nitrogen, produced at the exit of a pulsed supersonic nozzle for a range of flow enthalpies, are examined. Difficulties peculiar to the application of the optical technique to a high enthalpy pulsed flow facility are discussed and measurements of flow temperatures are presented. Theoretically calculated values for temperatures based upon algorithms used to determine shock tunnel flow conditions agree well with experimental measurements using the CARS technique.
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Pulford, D.R.N., Newman, D.S., Houwing, A.F.P. et al. The application of coherent anti-Stokes Raman scattering to temperature measurements in a pulsed high enthalpy supersonic flow. Shock Waves 4, 119–125 (1994). https://doi.org/10.1007/BF01417427
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DOI: https://doi.org/10.1007/BF01417427