Development of stimulated scattering as a diagnostic for supercritical fluids

Summary form only given. The study of supercritical fluids and flows requires new diagnostic techniques. Currently available techniques such as laser-induced fluorescence (LIF) and coherent anti-Stokes Raman scattering (CARS) cannot be easily applied to supercritical fluids. We are examining stimulated scattering (stimulated Rayleigh, Brillouin, and Raman scattering) as a diagnostic for supercritical fluids. These techniques can provide information on the thermal, compressional, and compositional properties of supercritical fuels. With a single detection system, all three processes-Rayleigh, Brillouin, and Raman-can be measured. These processes together provide measurements of a wide range of material properties. Rayleigh scattering provides information on thermal properties, Brillouin scattering on compressional or elastic properties, and Raman scattering on chemical and compositional properties, density, and temperature.