Improved particle trajectory calculations through turbomachinery affected by coal ash particles

Conference · Thu Jan 01 04:00:00 EST 1981

OSTI ID:5836000

Beacher, B; Tabakoff, W; Hamed, A

Trajectories of small coal ash particles encountered in coal-fired gas turbines are calculated with an improved computer analysis currently under development. The analysis uses an improved numerical grid and mathematical spline-fitting techniques to account for three-dimensional gradients in the flow field and blade geometry. The greater accuracy thus achieved in flow field definition improves the trajectory calculations over previous two-dimensional models by allowing the small particles to react to radial variations in the flow properties. A greater accuracy thus achieved in the geometry definition permits particle rebounding in a direction perpendicular to the blade and flow path surfaces rather than in a two-dimensional plane. The improved method also accounts for radial variations in airfoil chord, stagger, and blade thickness when computing particle impact at a blade location.

• OSTI ID: 5836000
• Country of Publication: United States
• Language: English

Related Subjects

20 FOSSIL-FUELED POWER PLANTS
200104* -- Fossil-Fueled Power Plants-- Components
ASHES
CALCULATION METHODS
CARBONACEOUS MATERIALS
COAL
COMBUSTION PRODUCTS
ENERGY SOURCES
EROSION
FOSSIL FUELS
FUELS
GAS TURBINES
MACHINERY
MATERIALS
PARTICLES
RESIDUES
TRAJECTORIES
TURBINE BLADES
TURBINES
TURBOMACHINERY