Particle and vapor deposition in coal-fired gas turbines
Mechanistic models have been developed for particle and vapor deposition on the blades of coal-fired gas turbines. The particle deposition models include the simultaneous contribution of Brownian and turbulent diffusion, thermophoresis, eddy impaction, and inertial impingement. The diffusive mechanisms have been validated against experimental data for low-speed cascade flow and particle-laden flow through pipes. The inertial deposition treatment is shown to collapse to the well-known expression for particle capture in a flow turning around a bend. A method is presented for calculating Na/sub 2/SO/sub 4/ and K/sub 2/SO/sub 4/ vapor deposition on cooled blades. Scaling laws are formulated for estimating the contribution of boundary layer homogeneous and heterogeneous nucleation mechanisms for highly cooled turbine blades. 20 refs., 12 figs.
- Research Organization:
- Argonne National Lab., IL (USA); Missouri Univ., Rolla (USA)
- DOE Contract Number:
- W-31109-ENG-38
- OSTI ID:
- 5949507
- Report Number(s):
- CONF-860635-1; ON: DE86003047
- Country of Publication:
- United States
- Language:
- English
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Related Subjects
200100* -- Fossil-Fueled Power Plants-- Power Plants & Power Generation
ALKALI METAL COMPOUNDS
BOUNDARY LAYERS
BROWNIAN MOVEMENT
CALCULATION METHODS
COAL-FIRED GAS TURBINES
DEPOSITION
DEPOSITS
FLUIDS
GAS TURBINES
GASES
LAYERS
MACHINERY
MATHEMATICAL MODELS
NUCLEATION
OXYGEN COMPOUNDS
PARTICLES
PARTICULATES
POTASSIUM COMPOUNDS
POTASSIUM SULFATES
SODIUM COMPOUNDS
SODIUM SULFATES
SULFATES
SULFUR COMPOUNDS
THERMOPHORESIS
TURBINE BLADES
TURBINES
TURBOMACHINERY
TURBULENCE
VAPOR CONDENSATION
VAPORS