SIMULTANEOUS COHERENT ANTI-STOKES-RAMAN SPECTROSCOPY MEASUREMENTS IN HYDROGEN-FUELED SUPERSONIC COMBUSTION

Coherent anti-Stokes Raman spectroscopy (CARS) has been used to measure H-2 and H2O concentrations and N2 temperature simultaneously in a H-2-fueled, air fed supersonic combustor. Profiles of each parameter at selected axial locations were generated by translating the measurement point vertically across the combustor at varying conditions of total temperature and equivalence ratio. The baseline combustor experiment contributes to an understanding of mixing and combustion processes and a data base for refining 2-D CFD codes. The combustor, the dual Stokes CARS system and the techniques employed are described. Sample results and potential improvements are also discussed.