A COMPARISON OF SUCTION PYROMETER AND CARS DERIVED TEMPERATURES IN ANINDUSTRIAL-SCALE FLAME

This report compares temperatures measured with the suction pyrometer and coherent anti-Stokes Raman spectroscopy (CARS) techniques in turbu lent, swirling, coal and No. 2 oil flames. The flames were generated i n a horizontally fired, cylindrical (1.0 m dia. by 5.0 m long), axi-sy mmetric, tunnel furnace (firing rate 1,000 MJ/h). A broadband USED-CAR S system was employed to make several, one thousand shot acquisitions in the furnace before and after the suction pyrometer measurements. Th ese experiments indicate that the CARS technique can successfully be a pplied to practical flames to make temperature measurements. It is dem onstrated that these measurements are more meaningful and more reliabl e than temperatures measured using a suction pyrometer.