Adherence of ash particles from the combustion of micronized coal. [Dependence on velocity, particle temperature, and target temperature]

Technical Report · Mon Oct 01 00:00:00 EDT 1984

OSTI ID:5791211

Anderson, R J; Romanowski, C J; France, J E

Experimental studies have addressed the adherence of residual particles resulting from the combustion of micronized coal under conditions approximating those found in combustion gas turbine hot gas pathways and components. The objectives of the studies are to understand the basic mechanisms responsible for the formation of the deposits and to develop a data base for the sticking coefficient (the fraction of particles adhering to a surface following collisions with the surface) of ash particles as a function of various parameters related to the hot gas stream, entrained particles, and subject surface. The tests utilize an entrained reactor which has been modified by the inclusion of an exhaust acceleration nozzle. Hot gas and entrained particles exit the nozzle at velocities up to 300 m/s and impinge on a target substrate whose surface can be controlled to temperatures as high as 1,350 K. All tests have been conducted with the target normal to the centerline of the nozzle. Measured values of the sticking coefficient have ranged from about 0.01 to 0.10 and are shown to be dependent upon target temperature, combustion temperature, and gas velocity. 16 refs., 6 figs., 1 tab.

• Research Organization: USDOE Morgantown Energy Technology Center, WV
• OSTI ID: 5791211
• Report Number(s): DOE/METC-85/2007; ON: DE85008600
• Country of Publication: United States
• Language: English

Related Subjects

20 FOSSIL-FUELED POWER PLANTS
01 COAL, LIGNITE, AND PEAT
FLY ASH
CHEMICAL COMPOSITION
PARTICULATES
ADHESION
COAL
COAL-FIRED GAS TURBINES
COMBUSTION
DEPOSITS
EXPERIMENTAL DATA
MELTING
NOZZLES
PLATINUM
SCANNING ELECTRON MICROSCOPY
SIMULATION
TEMPERATURE DEPENDENCE
VELOCITY
AEROSOL WASTES
ASHES
CARBONACEOUS MATERIALS
CHEMICAL REACTIONS
DATA
ELECTRON MICROSCOPY
ELEMENTS
ENERGY SOURCES
FOSSIL FUELS
FUELS
GAS TURBINES
INFORMATION
MACHINERY
MATERIALS
METALS
MICROSCOPY
NUMERICAL DATA
OXIDATION
PARTICLES
PHASE TRANSFORMATIONS
PLATINUM METALS
RESIDUES
THERMOCHEMICAL PROCESSES
TRANSITION ELEMENTS
TURBINES
TURBOMACHINERY
WASTES
200100* - Fossil-Fueled Power Plants- Power Plants & Power Generation
014000 - Coal
Lignite
& Peat- Combustion