Turbines are designed to operate with high inlet temperatures to improve engine performance. To reduce resulting from combustion, designs for combustors attempt to achieve flat pattern factors that results in high levels of heat transfer to the endwall of the first stage vane. Film-cooling is still one of the most effective cooling methods for many component features including the endwall. This paper presents results from a computational study of a film-cooled endwall. The endwall design considers both an upstream slot, representing the combustor—turbine junction, and a midpassage slot, representing the mating between the adjacent vanes. The focus of this study is on comparing adiabatic effectiveness levels on the endwall with varying leakage flowrates and gap widths. Results indicate reasonable agreement between computational predictions and experimental measurements of adiabatic effectiveness levels along the endwall. The results of this study show that the midpassage slot has a large influence on the coolant coverage. It was also shown that by raising the combustor relative to the downstream vane endwall, better coolant coverage from the combustor-turbine slot could be achieved.
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January 2011
Research Papers
Computational Study of a Midpassage Gap and Upstream Slot on Vane Endwall Film-Cooling
Satoshi Hada,
Satoshi Hada
Department of Gas Turbine Engineering,
Mitsubishi Heavy Industries, Ltd.
, Takasago, Hyogo, 676-8686, Japan
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Karen A. Thole
Karen A. Thole
Department of Mechanical and Nuclear Engineering,
Pennsylvania State University
, University Park, PA 16802
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Satoshi Hada
Department of Gas Turbine Engineering,
Mitsubishi Heavy Industries, Ltd.
, Takasago, Hyogo, 676-8686, Japan
Karen A. Thole
Department of Mechanical and Nuclear Engineering,
Pennsylvania State University
, University Park, PA 16802J. Turbomach. Jan 2011, 133(1): 011024 (9 pages)
Published Online: September 24, 2010
Article history
Received:
September 21, 2008
Revised:
December 14, 2009
Online:
September 24, 2010
Published:
September 24, 2010
Citation
Hada, S., and Thole, K. A. (September 24, 2010). "Computational Study of a Midpassage Gap and Upstream Slot on Vane Endwall Film-Cooling." ASME. J. Turbomach. January 2011; 133(1): 011024. https://doi.org/10.1115/1.4001135
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