Hot streaks can cause localized hot spots on the blade surfaces in a high pressure turbine, increasing the heat load locally and even leading to material loss in regions such as the rotor blade tip. This study explores numerically the effect of the hot streak’s clocking position at the stator inlet on the rotor blade heat load and on the tip in particular. The inlet boundary conditions are taken from the hot streak experiment conducted in the axial turbine facility “LISA” at ETH Zurich. Using a particle tracking tool, in conjunction with time resolved simulations, a detailed analysis of the migration pattern of the hot streak is performed and the underlying mechanisms are discussed. The effect of clocking the hot streak from midpitch to the stator pressure side and in the opposite direction is examined. By clocking this particular hot streak even 10% of the stator pitch toward the pressure side up to 24 K reduction in the rotor blade tip adiabatic wall temperatures could be achieved under realistic engine conditions. Finally, based on the observations made, the implications for an integrated combustor-turbine design strategy are discussed.
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e-mail: basola@lec.mavt.ethz.ch
e-mail: jenny@lec.mavt.ethz.ch
e-mail: ibrahim@lec.mavt.ethz.ch
e-mail: akalfas@auth.gr
e-mail: abhari@lec.mavt.ethz.ch
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June 2011
Research Papers
Hot Streak Migration in a Turbine Stage: Integrated Design to Improve Aerothermal Performance
Altug M. Basol,
Altug M. Basol
Department of Mechanical and Process Engineering, Laboratory for Energy Conversion,
e-mail: basola@lec.mavt.ethz.ch
ETH Zurich
, Zurich CH-8092 Switzerland
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Philipp Jenny,
Philipp Jenny
Department of Mechanical and Process Engineering, Laboratory for Energy Conversion,
e-mail: jenny@lec.mavt.ethz.ch
ETH Zurich
, Zurich CH-8092 Switzerland
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Mohamed Ibrahim,
Mohamed Ibrahim
Department of Mechanical and Process Engineering, Laboratory for Energy Conversion,
e-mail: ibrahim@lec.mavt.ethz.ch
ETH Zurich
, Zurich CH-8092 Switzerland
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Anestis I. Kalfas,
Anestis I. Kalfas
School of Engineering,
e-mail: akalfas@auth.gr
Aristotle University of Thessaloniki
, 52124 Thessaloniki, Greece
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Reza S. Abhari
Reza S. Abhari
Department of Mechanical and Process Engineering, Laboratory for Energy Conversion,
e-mail: abhari@lec.mavt.ethz.ch
ETH Zurich
, Zurich CH-8092, Switzerland
Search for other works by this author on:
Altug M. Basol
Department of Mechanical and Process Engineering, Laboratory for Energy Conversion,
ETH Zurich
, Zurich CH-8092 Switzerlande-mail: basola@lec.mavt.ethz.ch
Philipp Jenny
Department of Mechanical and Process Engineering, Laboratory for Energy Conversion,
ETH Zurich
, Zurich CH-8092 Switzerlande-mail: jenny@lec.mavt.ethz.ch
Mohamed Ibrahim
Department of Mechanical and Process Engineering, Laboratory for Energy Conversion,
ETH Zurich
, Zurich CH-8092 Switzerlande-mail: ibrahim@lec.mavt.ethz.ch
Anestis I. Kalfas
School of Engineering,
Aristotle University of Thessaloniki
, 52124 Thessaloniki, Greecee-mail: akalfas@auth.gr
Reza S. Abhari
Department of Mechanical and Process Engineering, Laboratory for Energy Conversion,
ETH Zurich
, Zurich CH-8092, Switzerlande-mail: abhari@lec.mavt.ethz.ch
J. Eng. Gas Turbines Power. Jun 2011, 133(6): 061901 (10 pages)
Published Online: February 17, 2011
Article history
Received:
May 29, 2010
Revised:
June 25, 2010
Online:
February 17, 2011
Published:
February 17, 2011
Citation
Basol, A. M., Jenny, P., Ibrahim, M., Kalfas, A. I., and Abhari, R. S. (February 17, 2011). "Hot Streak Migration in a Turbine Stage: Integrated Design to Improve Aerothermal Performance." ASME. J. Eng. Gas Turbines Power. June 2011; 133(6): 061901. https://doi.org/10.1115/1.4002349
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