Two-dimensional temperature determination in sooting flames by filtered Rayleigh scattering

We present what to our knowledge are the first filtered Rayleigh scattering temperature measurements and use them in sooting f lame. This new technique for two-dimensional thermography in gas combustion overcomes some of the major disadvantages of the standard Rayleigh technique. It suppresses scattered background light from walls or windows and permits detection of two-dimensional Rayleigh intensity distributions of the gas phase in the presence of small particles by spectral filtering of the scattered light.