A pyrometric method was developed earlier for the simultaneous <i>in situ</i> measurement of the temperature and the size of combusting fuel particles in entrained flow reactors. The temperature measurement is based on two-color pyrometry and the particle sizing on the proportionality of the measured radiative flux and the cross-sectional area of a particle at a known temperature. This particle-sizing method needs a discrimination procedure to confirm that the detected particle is valid for particle sizing. We report on a novel method for particle discrimination based on coaxial reference optics. The new method has several advantages compared with the method presented earlier, including the measurement in turbulent flow fields.
© 1998 Optical Society of America
(060.2310) Fiber optics and optical communications : Fiber optics
(120.1740) Instrumentation, measurement, and metrology : Combustion diagnostics
(120.4570) Instrumentation, measurement, and metrology : Optical design of instruments
(120.6780) Instrumentation, measurement, and metrology : Temperature
Timo Joutsenoja and Rolf Hernberg, "Pyrometric Sizing of High-Temperature Particles in Flow Reactors," Appl. Opt. 37, 3487-3493 (1998)