The paper investigates the deposition and erosion caused by Syngas ash particles in a film cooled leading edge region of a representative turbine vane. The carrier phase is predicted using large eddy simulation for three blowing ratios of 0.4, 0.8, and 1.2. Ash particle sizes of , , , , and are investigated using Lagrangian dynamics. The particles with momentum Stokes number, (based on approach velocity and leading edge diameter), follow the flow streamlines around the leading edge and few particles reach the blade surface. The particles, on the other hand with a high momentum Stokes number, , directly impinge on the surface, with blowing ratio having a minimal effect. The , , and particles with , 0.8 and 1.4, respectively, show some receptivity to coolant flow and blowing ratio. On a number basis, 85–90% of the particles, 70–65% of particles, 40–50% of particles, 15% of particles, and less than 1% of particles deposit on the surface. Overall there is a slight decrease in percentage of particles deposited with increase in blowing ratio. On the other hand, the potential for erosive wear is highest in the coolant hole and is mostly attributed to and particles. It is only at that particles contribute to erosive wear in the coolant hole.
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January 2011
Research Papers
Effects of Syngas Ash Particle Size on Deposition and Erosion of a Film Cooled Leading Edge
Ali Rozati,
Ali Rozati
Department of Mechanical Engineering, High Performance Computational Fluid-Thermal Sciences and Engineering Laboratory,
Virginia Polytechnic Institute and State University
, Blacksburg VA 24061
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Danesh K. Tafti,
Danesh K. Tafti
Department of Mechanical Engineering, High Performance Computational Fluid-Thermal Sciences and Engineering Laboratory,
Virginia Polytechnic Institute and State University
, Blacksburg VA 24061
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Sai Shrinivas Sreedharan
Sai Shrinivas Sreedharan
Department of Mechanical Engineering, High Performance Computational Fluid-Thermal Sciences and Engineering Laboratory,
Virginia Polytechnic Institute and State University
, Blacksburg VA 24061
Search for other works by this author on:
Ali Rozati
Department of Mechanical Engineering, High Performance Computational Fluid-Thermal Sciences and Engineering Laboratory,
Virginia Polytechnic Institute and State University
, Blacksburg VA 24061
Danesh K. Tafti
Department of Mechanical Engineering, High Performance Computational Fluid-Thermal Sciences and Engineering Laboratory,
Virginia Polytechnic Institute and State University
, Blacksburg VA 24061
Sai Shrinivas Sreedharan
Department of Mechanical Engineering, High Performance Computational Fluid-Thermal Sciences and Engineering Laboratory,
Virginia Polytechnic Institute and State University
, Blacksburg VA 24061J. Turbomach. Jan 2011, 133(1): 011010 (9 pages)
Published Online: September 9, 2010
Article history
Received:
December 23, 2008
Revised:
January 26, 2009
Online:
September 9, 2010
Published:
September 9, 2010
Citation
Rozati, A., Tafti, D. K., and Sreedharan, S. S. (September 9, 2010). "Effects of Syngas Ash Particle Size on Deposition and Erosion of a Film Cooled Leading Edge." ASME. J. Turbomach. January 2011; 133(1): 011010. https://doi.org/10.1115/1.4000492
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