Effect of soot on pyrometric measurements of coal particle temperature
The paper analyzes the effect that uniform soot clouds about the coal particles have on the temperature inferred from radiant emission measurements of burning coal dust suspensions. The emissive power from the non-isothermal coal/soot system is computed relative to the power emitted by the coal particles alone as a function of the soot properties, the coal particle size, the optical thickness of the suspension, and differences in temperature. The soot greatly increases the effective temperature if it is more than 200 K above the coal surface temperature. For soot volume fractions below about 10/sup -7/, the error created by the soot is usually less than 100 K. It is concluded that measurements in the infrared are preferable to the visible when soot is evident and if the soot is more than 200 K above the coal particle temperature.
- OSTI ID:
- 6911217
- Journal Information:
- Combust. Flame; (United States), Journal Name: Combust. Flame; (United States) Vol. 55:1; ISSN CBFMA
- Country of Publication:
- United States
- Language:
- English
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