PYROMETRIC SIZING OF HIGH-TEMPERATURE PARTICLES IN FLOW REACTORS

A pyrometric method was developed earlier for the simultaneous in situ measurement of the temperature and the size of combusting fuel partic les in entrained flow reactors. The temperature measurement is based o n two-color pyrometry and the particle sizing on the proportionality o f the measured radiative flux and the cross-sectional area of a partic le at a known temperature. This particle-sizing method needs a discrim ination procedure to confirm that the detected particle is valid for p article sizing. We report on a novel method for particle discriminatio n based on coaxial reference optics. The new method has several advant ages compared with the method presented earlier, including the measure ment in turbulent flow fields. (C) 1998 Optical Society of America.