Deposition on film-cooled turbine components was studied in an accelerated test facility. The accelerated deposition facility seeds a natural-gas burning combustor with finely ground coal ash particulate at and 180 m/s . Both cylindrical and shaped holes, with and without thermal barrier coating, were studied over a range of blowing ratios from 0.5 to 4.0. Coolant density ratios were maintained at values from 2.1 to 2.4. Deposition patterns generated with the cylindrical film cooling holes indicated regions of low deposition in the path of the coolant with heightened deposition between film holes. This distinctive pattern was more accentuated at higher blowing ratios. Optical temperature measurements of the turbine component surface during deposition showed elevated temperatures between coolant paths. This temperature nonuniformity became more accentuated as deposition increased, highlighting a mechanism for deposition growth that has been documented on in-service turbines as well. The shaped-hole components exhibited little or no deposition in the region just downstream of the holes due to the distributed coolant film. Close cylindrical hole spacing of 2.25d displayed similar behavior to the shaped-hole configuration.
Skip Nav Destination
Article navigation
July 2012
Research Papers
Deposition Near Film Cooling Holes on a High Pressure Turbine Vane
Weiguo Ai,
Weiguo Ai
Department of Chemical Engineering,
Brigham Young University
, Provo, UT 84602
Search for other works by this author on:
Nathan Murray,
Nathan Murray
Department of Chemical Engineering,
Brigham Young University
, Provo, UT 84602
Search for other works by this author on:
Thomas H. Fletcher,
Thomas H. Fletcher
Department of Chemical Engineering,
Brigham Young University
, Provo, UT 84602
Search for other works by this author on:
Spencer Harding,
Spencer Harding
Department of Mechanical Engineering,
Brigham Young University
, Provo, UT 84602
Search for other works by this author on:
Scott Lewis,
Scott Lewis
Department of Mechanical Engineering,
Ohio State University
, Columbus, OH 43210
Search for other works by this author on:
Jeffrey P. Bons
Jeffrey P. Bons
Department of Aerospace Engineering,
Ohio State University
, Columbus, OH 43210
Search for other works by this author on:
Weiguo Ai
Department of Chemical Engineering,
Brigham Young University
, Provo, UT 84602
Nathan Murray
Department of Chemical Engineering,
Brigham Young University
, Provo, UT 84602
Thomas H. Fletcher
Department of Chemical Engineering,
Brigham Young University
, Provo, UT 84602
Spencer Harding
Department of Mechanical Engineering,
Brigham Young University
, Provo, UT 84602
Scott Lewis
Department of Mechanical Engineering,
Ohio State University
, Columbus, OH 43210
Jeffrey P. Bons
Department of Aerospace Engineering,
Ohio State University
, Columbus, OH 43210J. Turbomach. Jul 2012, 134(4): 041013 (11 pages)
Published Online: July 21, 2011
Article history
Received:
October 12, 2010
Revised:
November 30, 2010
Online:
July 21, 2011
Published:
July 21, 2011
Citation
Ai, W., Murray, N., Fletcher, T. H., Harding, S., Lewis, S., and Bons, J. P. (July 21, 2011). "Deposition Near Film Cooling Holes on a High Pressure Turbine Vane." ASME. J. Turbomach. July 2012; 134(4): 041013. https://doi.org/10.1115/1.4003672
Download citation file:
Get Email Alerts
A Simplified Injection Model for Variable Area Turbine Fluidic Throttling
J. Turbomach (March 2025)
Conjugate Heat Transfer Validation of an Optimized Film Cooling Configuration for a Turbine Vane Endwall
J. Turbomach (March 2025)
Related Articles
Effect of Hole Spacing on Deposition of Fine Coal Flyash Near Film Cooling Holes
J. Turbomach (July,2012)
Experimental Simulation of a Film Cooled Turbine Blade Leading Edge Including Thermal Barrier Coating Effects
J. Turbomach (January,2011)
Effects of Surface Deposition, Hole Blockage, and Thermal Barrier Coating Spallation on Vane Endwall Film Cooling
J. Turbomach (July,2007)
Effects of Temperature and Particle Size on Deposition in Land Based Turbines
J. Eng. Gas Turbines Power (September,2008)
Related Chapters
Outlook
Closed-Cycle Gas Turbines: Operating Experience and Future Potential
Combined Cycle Power Plant
Energy and Power Generation Handbook: Established and Emerging Technologies
Control and Operational Performance
Closed-Cycle Gas Turbines: Operating Experience and Future Potential