Determination of local radiative properties in coal-fired flames
During the second year of this project, we have made progress in several areas, including the theoretical inverse analyses and the experiments with the cold-coal-flow system and the pulverized-coal-burner. The discussion in this report is divided into two main components to cover (A) Basic and Theoretical Studies, and (B) Experimental Studies. In part (A), we will discuss our recent efforts for the inverse solution of radiative transfer equation. Inverse analysis, which is based on a direct solution of the radiative transfer equation, is essential to recover radiative properties from the experimental data. The direct problem here can be considered as the propagation of radiation in a participating medium. In addition to the inverse method developed for cylindrical geometries, we also need to develop an inverse solution technique for plane-parallel, anisotropically scattering medium, which is to be used for cold-coal flow experiments. For this purpose, we have chosen to use a versatile Monte Carlo technique, and have shown that it is a very promising approach. In part (B), we discuss the experimental apparati developed to measure the radiative intensity distribution using a CO{sub 2} laser nephelometer. Recently, we accomplished to have a uniform, steady flow of pulverized-coal particles in a slab-geometry. Also, we developed a very accurate calibration scheme using glass particles with known size and complex index of refraction. 2 refs., 23 figs., 8 tabs.
- Research Organization:
- Kentucky Univ., Lexington, KY (USA). Dept. of Mechanical Engineering
- Sponsoring Organization:
- DOE/FE
- DOE Contract Number:
- FG22-87PC79916
- OSTI ID:
- 5500012
- Report Number(s):
- DOE/PC/79916-7; ON: DE90003315
- Country of Publication:
- United States
- Language:
- English
Similar Records
Determination of local radiative properties in coal-fired flames: Technical progress report, September 15, 1987--March 15, 1988
Determination of the radiative of pulverized-coal particles. Technical progress report, third quarter of the third year, March 15, 1990--June 15, 1990
Related Subjects
COAL
COMBUSTION
FLAMES
MONTE CARLO METHOD
PARTICLE SIZE
PROGRESS REPORT
RADIANT HEAT TRANSFER
SCATTERING
CARBONACEOUS MATERIALS
CHEMICAL REACTIONS
DOCUMENT TYPES
ENERGY SOURCES
ENERGY TRANSFER
FOSSIL FUELS
FUELS
HEAT TRANSFER
MATERIALS
OXIDATION
SIZE
THERMOCHEMICAL PROCESSES
014000* - Coal
Lignite
& Peat- Combustion
010600 - Coal
Lignite
& Peat- Properties & Composition