Future advanced turbine systems for electric power generation, based on coal-gasified fuels with capture and sequestration, are aimed for achieving higher cycle efficiency and near-zero emission. The most promising operating cycles being developed are hydrogen-fired cycle and oxyfuel cycle. Both cycles will likely have turbine working fluids significantly different from that of conventional air-based gas turbines. In addition, the oxyfuel cycle will have a turbine inlet temperature target at approximately 2030 K , significantly higher than the current level. This suggests that aerothermal control and cooling will play a critical role in realizing our nation’s future fossil power generation systems. This paper provides a computational analysis in comparing the internal cooling performance of a double-wall or skin-cooled airfoil to that of an equivalent serpentine-cooled airfoil. The present results reveal that the double-wall or skin-cooled approach produces superior performance than the conventional serpentine designs. This is particularly effective for the oxyfuel turbine with elevated turbine inlet temperatures. The effects of coolant-side internal heat transfer coefficient on the airfoil metal temperature in both hydrogen-fired and oxyfuel turbines are evaluated. The contribution of thermal barrier coatings toward overall thermal protection for turbine airfoil cooled under these two different cooling configurations is also assessed.
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March 2009
Research Papers
Aerothermal Challenges in Syngas, Hydrogen-Fired, and Oxyfuel Turbines—Part II: Effects of Internal Heat Transfer
Minking K. Chyu,
Minking K. Chyu
Department of Mechanical Engineering and Materials Science,
University of Pittsburgh
, Pittsburgh, PA 15261; National Energy Technology Laboratory
, Pittsburgh, PA 15236
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Sean C. Siw,
Sean C. Siw
Department of Mechanical Engineering and Materials Science,
University of Pittsburgh
, Pittsburgh, PA 15261
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Ventzislav G. Karaivanov,
Ventzislav G. Karaivanov
Department of Mechanical Engineering and Materials Science,
University of Pittsburgh
, Pittsburgh, PA 15261
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William S. Slaughter,
William S. Slaughter
Department of Mechanical Engineering and Materials Science,
University of Pittsburgh
, Pittsburgh, PA 15261
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Mary Anne Alvin
Mary Anne Alvin
National Energy Technology Laboratory
, Pittsburgh, PA 15236
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Minking K. Chyu
Department of Mechanical Engineering and Materials Science,
University of Pittsburgh
, Pittsburgh, PA 15261; National Energy Technology Laboratory
, Pittsburgh, PA 15236
Sean C. Siw
Department of Mechanical Engineering and Materials Science,
University of Pittsburgh
, Pittsburgh, PA 15261
Ventzislav G. Karaivanov
Department of Mechanical Engineering and Materials Science,
University of Pittsburgh
, Pittsburgh, PA 15261
William S. Slaughter
Department of Mechanical Engineering and Materials Science,
University of Pittsburgh
, Pittsburgh, PA 15261
Mary Anne Alvin
National Energy Technology Laboratory
, Pittsburgh, PA 15236J. Thermal Sci. Eng. Appl. Mar 2009, 1(1): 011003 (10 pages)
Published Online: July 21, 2009
Article history
Received:
December 15, 2008
Revised:
March 24, 2009
Published:
July 21, 2009
Connected Content
A companion article has been published:
Aerothermal Challenges in Syngas, Hydrogen-Fired, and Oxyfuel Turbines—Part I: Gas-Side Heat Transfer
Citation
Chyu, M. K., Siw, S. C., Karaivanov, V. G., Slaughter, W. S., and Alvin, M. A. (July 21, 2009). "Aerothermal Challenges in Syngas, Hydrogen-Fired, and Oxyfuel Turbines—Part II: Effects of Internal Heat Transfer." ASME. J. Thermal Sci. Eng. Appl. March 2009; 1(1): 011003. https://doi.org/10.1115/1.3159480
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