TEMPERATURE MEASUREMENTS IN AN INDUSTRIAL FURNACE BY SPONTANEOUS ANTI-STOKES RAMAN SPECTROSCOPY

摘要

Spontaneous anti-Stokes Raman scattering from N_2 was employed to measure the temperature profiles inside an industrial furnace with a water-cooled probe. Prior to the field measurements, the system performance was evaluated and maximized in a laboratory furnace at several temperatures below 1300·K. The temperatures of about 1500K have been measured in the industrial furnace, and they are in agreement with data recorded with a thermocouple probe. Spontaneous anti-Stokes Raman was found to be a reliable tool for non-intrusive absolute temperature measurements in industrial furnaces with relatively clean gas streams. Little dependence was found on the laser power and optics mis-alignment.