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Keywords: shaped holes
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Proceedings Papers

Proc. ASME. GT2022, Volume 6A: Heat Transfer — Combustors; Film Cooling, V06AT12A044, June 13–17, 2022
Paper No: GT2022-83436
... measured performance for this hole was much less than computationally predicted, it still had a 75% improved performance compared to the conventional 7-7-7 shaped hole. In the current study, the X-AOpt and Co-AOpt shaped holes were experimentally evaluated using measurements of adiabatic effectiveness...
Proceedings Papers

Proc. ASME. GT2022, Volume 6A: Heat Transfer — Combustors; Film Cooling, V06AT12A031, June 13–17, 2022
Paper No: GT2022-82726
.... The associated RANS computations predicted that the holes optimized for use with cross- ow (X-AOpt) and co- ow (Co-AOpt) would increase adiabatic e ectiveness signi cantly compared to a baseline 7-7-7 shaped hole. Experimental validations of these performance predictions are presented in companion paper...
Proceedings Papers

Proc. ASME. GT2021, Volume 5A: Heat Transfer — Combustors; Film Cooling, V05AT12A026, June 7–11, 2021
Paper No: GT2021-60014
... holes provides more reliable thermal protection than that using cylindrical holes, the effects on cooling performance from varying the geometric details of the shaped hole design are not well characterized. In this study, adiabatic effectiveness and off-the-wall thermal field measurements were conducted...
Proceedings Papers

Proc. ASME. GT2021, Volume 5A: Heat Transfer — Combustors; Film Cooling, V05AT12A004, June 7–11, 2021
Paper No: GT2021-58950
...Abstract Abstract Few studies in the open literature have studied the effect of thermal barrier coatings when used in combination with shaped hole film cooling and enhanced internal cooling techniques. The current study presents RANS conjugate heat transfer simulations that identify trends...
Proceedings Papers

Proc. ASME. GT2021, Volume 5A: Heat Transfer — Combustors; Film Cooling, V05AT12A027, June 7–11, 2021
Paper No: GT2021-60015
... and off-the-wall thermal field measurements were made using a shaped hole geometry fed by an ideal plenum coolant feed and by an engine-realistic impingement coolant feed. The impingement configuration exhibited around 10% higher adiabatic effectiveness levels than the plenum configuration did — a finding...
Proceedings Papers

Proc. ASME. GT2021, Volume 5A: Heat Transfer — Combustors; Film Cooling, V05AT12A023, June 7–11, 2021
Paper No: GT2021-59780
... Proceedings of ASME Turbo Expo 2021 Turbomachinery Technical Conference and Exposition GT2021 June 7-11, 2021, Virtual, Online GT2021-59780 CFD EVALUATION OF INTERNAL FLOW EFFECTS ON TURBINE BLADE LEADING-EDGE FILM COOLING WITH SHAPED HOLE GEOMETRIES Christopher C. Easterby1 Jacob D. Moore1, David...
Proceedings Papers

Proc. ASME. GT2011, Volume 5: Heat Transfer, Parts A and B, 303-313, June 6–10, 2011
Paper No: GT2011-45524
... that the existence of the ACRV is the likely reason for the enhanced cooling performance of the new configuration. double-jet ejection shaped holes film-coolings blowing ratio film-cooling effectiveness ABSTRACT Further improvement of the thermal efficiency of modern gas turbines can be achieved...
Proceedings Papers

Proc. ASME. GT2003, Volume 5: Turbo Expo 2003, Parts A and B, 247-256, June 16–19, 2003
Paper No: GT2003-38369
... 05 02 2009 Secondary flows in the cooling jets are the main reason for the degradation of the cooling performance of a film-cooled blade. The formation of kidney vortices can significantly be reduced for shaped holes instead of cylindrical holes. For the determination of the film...