PYROMETRIC MEASUREMENT OF THE TEMPERATURE AND SIZE OF INDIVIDUAL COMBUSTING FUEL-PARTICLES

A two-color pyrometric technique was developed for the in situ simulta neous measurement of individual fuel-particle temperatures and sizes i n a pressurized entrained flow reactor (PEFR). A method that requires only a single optical port was developed, and a specially designed opt ical probe was manufactured for the measurements at the PEFR. The fuel -particle temperature was obtained by applying two-color pyrometry. Th e particle size was determined from the same pyrometric signals. A dis crimination method was developed to confirm that the detected particle was valid for particle sizing. Several series of measurements were ma de at a PEFR at different process conditions, and some typical results are shown. (C) 1997 Optical Society of America.