TY - GEN
T1 - Aerodynamic loss characteristics of a turbine blade with trailing edge coolant ejection
T2 - ASME Turbo Expo 2000: Power for Land, Sea, and Air, GT 2000
AU - Uzol, Oguz
AU - Camci, Cengiz
N1 - Funding Information:
This work was supported by grants from the Israel Science Foundation (ISF), German-Israeli Binational Foundation (GIF), International Union against Cancer (AICR) and by the Rappaport Family Institute for Research in the Medical Sciences of the Faculty of Medicine at theTechnion, Israel Institute of Technology (to G. Neufeld).
Publisher Copyright:
Copyright © 2000 ASME.
PY - 2000
Y1 - 2000
N2 - Investigation of the internal fluid mechanic losses for a turbine blade with trailing edge coolant ejection was presented in Uzol, Camci and Glezer (2000). The current study is a detailed experimental investigation of the external subsonic flowfield near the trailing edge and the investigation of the external aerodynamic loss characteristics of the turbine blade with trailing edge coolant ejection system. Particle Image Velocimetry experiments and total pressure surveys in the near wake of the blade are conducted for two different Reynolds Numbers and four different ejection rates. Two different trailing edge configurations with different cut-back lengths are also investigated. Numerical simulations of the flowfield are also performed for qualitative flow visualization purposes. Two dimensional, incompressible and steady solutions of Reynolds Averaged Navier Stokes equations are obtained. A two equation standard k-e turbulence model coupled with an Algebraic Reynolds Stress Model is used for the simulation of the turbulent flowfield. The results show that the aerodynamic penalty levels in the wake region near the trailing edge are increased due to the mixing of the coolant and main stream flows for 0 to 3% ejection rates. However after a threshold level (5% ejection rate), the ejected coolant flow has enough momentum to fill the wake of the blade which in turn results in a decrease in the aerodynamic penalty levels.
AB - Investigation of the internal fluid mechanic losses for a turbine blade with trailing edge coolant ejection was presented in Uzol, Camci and Glezer (2000). The current study is a detailed experimental investigation of the external subsonic flowfield near the trailing edge and the investigation of the external aerodynamic loss characteristics of the turbine blade with trailing edge coolant ejection system. Particle Image Velocimetry experiments and total pressure surveys in the near wake of the blade are conducted for two different Reynolds Numbers and four different ejection rates. Two different trailing edge configurations with different cut-back lengths are also investigated. Numerical simulations of the flowfield are also performed for qualitative flow visualization purposes. Two dimensional, incompressible and steady solutions of Reynolds Averaged Navier Stokes equations are obtained. A two equation standard k-e turbulence model coupled with an Algebraic Reynolds Stress Model is used for the simulation of the turbulent flowfield. The results show that the aerodynamic penalty levels in the wake region near the trailing edge are increased due to the mixing of the coolant and main stream flows for 0 to 3% ejection rates. However after a threshold level (5% ejection rate), the ejected coolant flow has enough momentum to fill the wake of the blade which in turn results in a decrease in the aerodynamic penalty levels.
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U2 - 10.1115/2000-GT-0557
DO - 10.1115/2000-GT-0557
M3 - Conference contribution
AN - SCOPUS:84961318974
T3 - Proceedings of the ASME Turbo Expo
BT - Heat Transfer; Electric Power; Industrial and Cogeneration
PB - American Society of Mechanical Engineers (ASME)
Y2 - 8 May 2000 through 11 May 2000
ER -