Induced draft fans extract coal fired boiler combustion products, including particles of un-burnt coal and ash. As a consequence of the particles, the axial fan blades’ leading edges are subject to erosion. Erosion results in the loss of the blade leading edge aerodynamic profile and a reduction of blade chord and effective camber that together degrade aerodynamic performance. An experimental study demonstrated that while the degradation of aerodynamic performance begins gradually, it collapses as blade erosion reaches a critical limit. This paper presents a numerical study on the evolution of blade leading edge erosion patterns in an axial induced draft fan. The authors calculated particle trajectories using an in-house computational fluid dynamic (CFD) solver coupled with a trajectory predicting solver based on an original finite element interpolation scheme. The numerical study clarifies the influence of flow structure, initial blade geometry, particle size, and concentration on erosion pattern.
Issue Section:
Gas Turbines: Turbomachinery
References
1.
Kurz
, R.
, and Brun
, K.
, 2001, “Degradation in Gas Turbine Systems
,” J. Eng. Gas Turbines Power
, 123
, pp. 70
–77
.2.
Hamed
, A.
, Tabakoff
, W.
, and Wenglarz
, R.
, 2006, “Erosion and Deposition in Turbomachinery
,” J. Propul. Power
, 22
, pp. 350
–360
.3.
Atkin
, M. L.
, and Duke
, G. A.
, 1971, “Erosion Prediction in Turbomachinery Resulting From Environmental Particles
,” Aeron. Research Lab. Dept. of Supply, Australian Defense Scientific Service, Report No. 133.4.
Grant
, G.
, and Tabakoff
, W.
, 1975, “Erosion Prediction in Turbomachinery Resulting From Environmental Solid Particles”
, J. Aircr.
, 12
(5
), pp. 471
–478
.5.
Richardson
, J. H.
, Sallee
, G. P.
, and Smakula
, F. K.
, 1979, “Causes of High Pressure Compressor Deterioration in Service
,” AIAA Paper No. 79-1234.6.
Balan
, C.
, and Tabakoff
, W.
, 1984, “Axial Compressor Performance Deterioration
,” AIAA Paper No. 84-1208.7.
Sallee
, G. P.
, Kruckenburg
, H. D.
, and Toomey
, E. H.
, 1978, “Analysis of Turbofan Engine Performance Deterioration and Proposed Follow-On Tests
,” Report No. NASA-CR-134769.8.
Ghenaiet
, A.
, Tan
, S. C.
, and Elder
, R. L.
, 2004, “Experimental Investigation of Axial Fan Erosion and Performance Degradation
,” Proc. Inst Mech. Eng., Part A
, 218
(6
), pp. 437
–446
.9.
Sugano
, H.
, Yamaguchi
, N.
, and Taguchi
, S.
, 1982, “A Study on the Ash Erosion of Axial Induced Draft Fans of Coal-Fired Boilers
,” TR19, Mitsubishi Heavy Industries.10.
Bengtsson
, A.
, 2010, Fläkt Woods AB internal report.11.
Hussein
, M. F.
, and Tabakoff
, W.
, 1974, “Computation and Plotting of Solid Particle Flow in Rotating Cascades
,” Comput. Fluids
, 2
(1
), pp. 1
–15
.12.
Elfeki
, S.
, and Tabakoff
, W.
, 1987, “Erosion Study of Radial Flow Compressor With Splitters
,” J. Turbomach.
, 109
(1
), pp. 62
–69
.13.
Ghenaiet
, A.
, 2005, “Numerical Simulations of Flow and Particle Dynamics Within a Centrifugal Turbomachine
,” Compressors and Their Systems 2005, IMechE Paper No. C639-52.14.
Ghenaiet
, A.
, 2009, “Numerical Study of Sand Ingestion Through a Ventilating System
,” Proceedings of the World Congress on Engineering
, London, UK
.15.
Borello
, D.
, Corsini
, A.
, Rispoli
, F.
, 2003, “A Finite Element Overlapping Scheme for Turbomachinery Flows on Parallel Platforms
,” Comput. Fluids
, 32
(7
), pp. 1017
–1047
.16.
Kirk
, B. S.
, Peterson
, J. W.
, Stogner
, R. H.
, and Carey
, G. F.
, 2006, “libMesh: A C++ Library for Parallel Adaptive Mesh Refinement/Coarsening Simulations
,” Eng. Comput.
, 22
, pp. 237
–254
.17.
Corsini
, A.
, Rispoli
, F.
, Santoriello
, A.
, and Tezduyar
, T.
, 2006, “Improved Discontinuity-Capturing Finite Element Techniques for Reaction Effects in Turbulence Computation
,” Comput. Mech.
, 38
, pp. 356
–364
.18.
Baxter
, L. L.
, 1989, “Turbulent Transport of Particles
,” Ph.D. thesis, Brigham Young University, Provo, UT.19.
Wang
, L. P.
, 1990, “On the Dispersion of Heavy Particles by Turbulent Motion
,” Ph.D. thesis, Washington State University, Pullman, WA.20.
Litchford
, L. J.
, and Jeng
, S. M.
, 1991, “Efficient Statistical Transport Model for Turbulent Particle Dispersion in Sprays
,” AIAA J.
, 29
, pp. 1443
–1451
.21.
Baxter
, L. L.
, and Smith
, P. J.
, 1993, “Turbulent Dispersion of Particles: The STP Model
,” Energy Fuels
, 7
, pp. 852
–859
.22.
Jain
, S.
, 1995, “Three-Dimensional Simulation of Turbulent Particle Dispersion
,” Ph.D. thesis, University of Utah, Salt Lake City, UT.23.
Kær
, S. K.
, 2001, “Numerical Investigation of Ash Deposition in Straw-Fired Furnaces
,” Ph.D. Thesis, Aalborg University, Aalborg, Denmark.24.
Venturini
, P.
, Borello
, D.
, Iossa
, C. V.
, Lentini
, D.
, and Rispoli
, F.
, 2010, “Modelling of Multiphase Combustion and Deposit Formation in a Biomass-Fed Boiler
,” Energy
, 35
, pp. 3008
–3021
.25.
Page
, A. L.
, Elseewi
, A. A.
, and Straughan
, I. R.
, 1979, “Physical and Chemical Properties of Fly Ash From Coal-Tired Power Plants With Reference to Environmental Impacts
,” Residue Rev.
, 71
, pp. 83
–120
.26.
Flakt Woods, 2010, private communication.
27.
Crowe
, C. T.
, Troutt
, T. R.
, and Chung
, J. N.
, 1996, “Numerical Models of Two-Phase Turbulent Flows
,” Ann. Rev. Fluid Mech.
, 28
, pp. 11
–43
.28.
Venturini
, P.
, 2010, “Modelling of Particle-Wall Deposition in Two-Phase Gas-Solid Flows
,” Ph.D. thesis, Sapienza Università di Roma, Rome, Italy.29.
Tabakoff
, W.
, Kotwal
, R.
, and Hamed
, A.
, 1979, “Erosion Study of Different Materials Affected by Coal Ash Particles
,” Wear
, 52
(1
), pp. 161
–173
.30.
Craft
, T. J.
, Launder
, B. E.
, and Suga
, K.
, 1996, “Development and Application of a Cubic Eddy-Viscosity Model of Turbulence
,” Int. J. Heat Fluid Flow
, 17
, pp. 108
–155
.31.
Corsini
, A.
, and Rispoli
, F.
, 2005, “Flow Analyses in a High-Pressure Axial Ventilation Fan With a Non-Linear Eddy-Viscosity Closure
,” Int. J. Heat Fluid Flow
, 26
, pp. 349
–361
.32.
Sheard
, A. G.
, Corsini
, A.
, Minotti
, S.
, and Sciulli
, F.
, 2009, “The Role of Computational Methods in the Development of an Aero-Acoustic Design Methodology: Application to a Family of Large Industrial Fans
,” CMMF 2009, Budapest, Sept. 9–12.33.
Corsini
, A.
, and Rispoli
, F.
, 2004, “Using Sweep to Extend Stall-Free Operational Range in Axial Fan Rotors
,” J. Power Energy
, 218
, pp. 129
–139
.34.
Corsini
, A.
, Marchegiani
, A.
, and Sheard
, A. G.
, 2011, “A Numerical Study of the Aerodynamic Consequences of Blade Leading-Edge In-Service Erosion on the Performance Characteristics of a Coal Fired Boiler Induced-Draft Fan
,” In review with the 9th European Conference on Turbomachinery
, Fluid Dynamics and Thermodynamics
, Istanbul, Turkey
.Copyright © 2012
by American Society of Mechanical Engineers
You do not currently have access to this content.
