Atomization characteristics of coal-water slurry. Final report
Dwindling supplies of oil have led to increasing interest in alternative fuels which can be used to replace petroleum-derived liquid fuels. One such fuel is coal-water slurry. This study presents the atomization behavior of coal-water slurries at conditions typical of a gas turbine combustor. Slurry spray characteristics were determined using five different types of atomizer. The five nozzle types included were: (1) plain-orifice, (2) pressure-swirl, (3) plain-jet airblast, (4) air-assist and (5) prefilming airblast. The effects of airblast air velocity, chamber pressure and air-to-fuel mass ratio (AFR) on SMD were investigated for the latter three nozzle types. Values of SMD were determined for levels of tank pressure between 1 and 2.0 MPa, air-to-fuel mass ratios (AFR) between 0.5 and 6.0, and airblast air velocities between 30 and 100 m/sec. Several slurries with loadings between 50 and 70% (by weight) were used. The Sauter mean diameter and drop size distribution parameter were measured using the forward light-scattering technique in the form of a commercially available Malvern 2600 particle size analyzer. Droplet microstructure was determined using the liquid nitrogen-freezing technique and spray radial and circumferential patternation data were obtained through the use of a patternator. 39 refs., 64 figs., 4 tabs.
- Research Organization:
- Purdue Univ., Lafayette, IN (USA). School of Mechanical Engineering
- DOE Contract Number:
- AC21-83MC20462
- OSTI ID:
- 5604116
- Report Number(s):
- DOE/MC/20462-2026; ON: DE86006456
- Country of Publication:
- United States
- Language:
- English
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Related Subjects
013000* -- Coal
Lignite
& Peat-- Transport
Handling
& Storage
ATOMIZATION
CARBONACEOUS MATERIALS
CHEMICAL COMPOSITION
COAL
COAL FINES
COMBUSTORS
CRYSTAL STRUCTURE
DATA
DESIGN
DISPERSIONS
DROPLETS
ENERGY SOURCES
EXPERIMENTAL DATA
FOSSIL FUELS
FUEL SLURRIES
FUEL-AIR RATIO
FUELS
GAS TURBINES
HYDROGEN COMPOUNDS
INFORMATION
MACHINERY
MATERIALS
MICROSTRUCTURE
MIXTURES
NOZZLES
NUMERICAL DATA
OXYGEN COMPOUNDS
PARTICLE SIZE
PARTICLES
PRESSURE EFFECTS
SHEAR
SIZE
SLURRIES
SUSPENSIONS
TURBINES
TURBOMACHINERY
VISCOSITY
WATER