A thermal barrier coating (TBC)-coated turbine blade coupon was exposed to successive deposition in an accelerated deposition facility simulating flow conditions at the inlet to a first stage high pressure turbine (, ). The combustor exit flow was seeded with dust particulate that would typically be ingested by a large utility power plant. The turbine coupon was subjected to four successive deposition tests. The particulate loading was scaled to simulate 0.02 parts per million weight (ppmw) of particulate over of continuous gas turbine operation for each laboratory simulation (for a cumulative of operation). Three-dimensional maps of the deposit-roughened surfaces were created between each test, representing a total of four measurements evenly spaced through the lifecycle of a turbine blade surface. From these measurements, scaled models were produced for testing in a low-speed wind tunnel with a turbulent, zero pressure gradient boundary layer at . The average surface heat transfer coefficient was measured using a transient surface temperature measurement technique. Stanton number increases initially with deposition but then levels off as the surface becomes less peaked. Subsequent deposition exposure then produces a second increase in St. Surface maps of St highlight the local influence of deposit peaks with regard to heat transfer.
Skip Nav Destination
Article navigation
April 2008
Research Papers
Evolution of Surface Deposits on a High-Pressure Turbine Blade—Part II: Convective Heat Transfer
Jeffrey P. Bons,
Jeffrey P. Bons
Department of Mechanical Engineering,
Brigham Young University
, Provo, UT 84602
Search for other works by this author on:
James E. Wammack,
James E. Wammack
Department of Mechanical Engineering,
Brigham Young University
, Provo, UT 84602
Search for other works by this author on:
Jared Crosby,
Jared Crosby
Department of Mechanical Engineering,
Brigham Young University
, Provo, UT 84602
Search for other works by this author on:
Daniel Fletcher,
Daniel Fletcher
Department of Mechanical 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:
Jeffrey P. Bons
Department of Mechanical Engineering,
Brigham Young University
, Provo, UT 84602
James E. Wammack
Department of Mechanical Engineering,
Brigham Young University
, Provo, UT 84602
Jared Crosby
Department of Mechanical Engineering,
Brigham Young University
, Provo, UT 84602
Daniel Fletcher
Department of Mechanical Engineering,
Brigham Young University
, Provo, UT 84602
Thomas H. Fletcher
Department of Chemical Engineering,
Brigham Young University
, Provo, UT 84602J. Turbomach. Apr 2008, 130(2): 021021 (7 pages)
Published Online: March 25, 2008
Article history
Received:
September 8, 2006
Revised:
November 15, 2006
Published:
March 25, 2008
Connected Content
A companion article has been published:
Evolution of Surface Deposits on a High-Pressure Turbine Blade—Part I: Physical Characteristics
Citation
Bons, J. P., Wammack, J. E., Crosby, J., Fletcher, D., and Fletcher, T. H. (March 25, 2008). "Evolution of Surface Deposits on a High-Pressure Turbine Blade—Part II: Convective Heat Transfer." ASME. J. Turbomach. April 2008; 130(2): 021021. https://doi.org/10.1115/1.2752183
Download citation file:
Get Email Alerts
Evaluating Thin-Film Thermocouple Performance on Additively Manufactured Turbine Airfoils
J. Turbomach (July 2025)
Related Articles
Turbine Blade Surface Deterioration by Erosion
J. Turbomach (July,2005)
Evolution of Surface Deposits on a High-Pressure Turbine Blade—Part I: Physical Characteristics
J. Turbomach (April,2008)
Simulated Land-Based Turbine Deposits Generated in an Accelerated Deposition Facility
J. Turbomach (July,2005)
A Review of Surface Roughness Effects in Gas Turbines
J. Turbomach (April,2010)
Related Proceedings Papers
Related Chapters
The Special Characteristics of Closed-Cycle Gas Turbines
Closed-Cycle Gas Turbines: Operating Experience and Future Potential
Outlook
Closed-Cycle Gas Turbines: Operating Experience and Future Potential
Control and Operational Performance
Closed-Cycle Gas Turbines: Operating Experience and Future Potential