COHERENT ANTI-STOKES-RAMAN SCATTERING (CARS) THERMOMETRY IN A MODEL GAS-TURBINE CAN COMBUSTOR

Nonintrusive, spatially resolved instantaneous temperature measurement s are presented that were obtained from a reacting spray flame in a mo del gas turbine can combustor using coherent anti-Stokes Raman scatter ing (CARS) thermometry. The results show that CARS measurements agree with thermocouple measurements at the exit of the combustor. The liqui d droplet induced dielectric breakdown is not an obstacle in applying CARS to reacting sprays. The CARS measured temperature field also indi cates that there is a relatively cool region (T < 1000 K) near the noz zle tip. Reaction occurs in the region where large numbers of droplets are present and in the interface of the swirl-induced recirculation z one. This study demonstrates that CARS is a viable diagnostic tool for nonintrusive, instantaneous temperature measurements in practical spr ay flames.