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Keywords: blowing ratio
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Proceedings Papers

Proc. ASME. GT2021, Volume 5A: Heat Transfer — Combustors; Film Cooling, V05AT12A015, June 7–11, 2021
Paper No: GT2021-59366
.... The cooling holes are divided into a 2-zone plenum to locally maintain the desired blowing ratios based on the external pressure field. Two coolant injection scenarios are considered by injecting coolant through the tip holes only and both tip and PS surface holes together. The blowing ratio (M) and density...
Proceedings Papers

Proc. ASME. GT2020, Volume 4B: Combustion, Fuels, and Emissions, V04BT04A029, September 21–25, 2020
Paper No: GT2020-15939
... at various offset distances to visualize the mixing between the core flow and effusion jets. The PLIF images were analyzed with a POD-based methodology to de-noise the images and identify patterns in the effusion jet characteristics. The results show that high blowing ratios produce individual effusion jets...
Proceedings Papers

Proc. ASME. GT2013, Volume 3B: Heat Transfer, V03BT13A040, June 3–7, 2013
Paper No: GT2013-95027
... the overall averaged adiabatic film cooling effectiveness under the experimental conditions. Film cooling blowing ratio jet interaction phenomena film cooling effectiveness anti-counter-rotating vortices 1 Copyright © 2013 by ASME HIGHEST-EFFICIENT FILM COOLING BY IMPROVED NEKOMIMI FILM COOLING...
Proceedings Papers

Proc. ASME. GT2013, Volume 3B: Heat Transfer, V03BT13A042, June 3–7, 2013
Paper No: GT2013-95042
... to highest film cooling effectiveness has been performed. The best configuration outperforms the basic configuration by more than 20% regarding the overall averaged adiabatic film cooling effectiveness. Film cooling blowing ratio jet interaction phenomena film cooling effectiveness anti-counter...
Proceedings Papers

Proc. ASME. GT2012, Volume 4: Heat Transfer, Parts A and B, 1389-1396, June 11–15, 2012
Paper No: GT2012-68563
... Three-dimensional simulations of the squealer tip on the GE-E3 blade with eight film cooling holes were carried out. The effect of different blade spans and different blowing ratios on the tip flow and cooling performance was revealed with the k-ε model. For the squealer tip, the depth...
Proceedings Papers

Proc. ASME. GT2012, Volume 4: Heat Transfer, Parts A and B, 1299-1310, June 11–15, 2012
Paper No: GT2012-68400
... jet that prevent the hot gas from flowing underneath the jet and, thus, avoid the lift-off effect. One of these technologies is the NEKOMIMI film cooling, which is derived from the original double-jet film cooling (DJFC). double-jet ejection film cooling blowing ratio jet interaction...
Topics: Film cooling
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. GT2010, Volume 4: Heat Transfer, Parts A and B, 1503-1515, June 14–18, 2010
Paper No: GT2010-22604
... jet film cooling technique for the high blowing ratios M=1, M=1.5 and M=2. Various geometries of fan-shaped holes with lateral expansion angles of 10°, 14° and 18° are used for the comparison study. It can be shown that the shaped hole row arrangement provides higher cooling values in a slight region...
Topics: Film cooling
Proceedings Papers

Proc. ASME. GT2009, Volume 3: Heat Transfer, Parts A and B, 199-211, June 8–12, 2009
Paper No: GT2009-59321
... to each other. ally, the design of double-jet holes reduces ntly the effort of hole manufacturing compared to the manufacturing a shaped hole design. al investigations for blowing ratios from M=0.5 up to d experimental investigations in a test rig prove the film cooling ability of the double-jet film...
Topics: Film cooling
Proceedings Papers

Proc. ASME. GT2008, Volume 4: Heat Transfer, Parts A and B, 23-34, June 9–13, 2008
Paper No: GT2008-50073
... in recent publications. Whereas the original design application has been for moderate and high blowing ratios, the present numerical investigation shows that the DJFC is also applicable for lower blowing ratios (0.5<M<1.0) with only slight modification of the geometry of the configuration. The anti...
Topics: Film cooling
Proceedings Papers

Proc. ASME. GT2007, Volume 4: Turbo Expo 2007, Parts A and B, 305-315, May 14–17, 2007
Paper No: GT2007-27301
... in a combined jet from two jets starting from two cylindrical ejection holes. The influence of the blowing ratio on the double-jet ejection is investigated numerically. The configurations of the double-hole arrangements have been investigated only for a relative high blowing ratio (M = 1.7). The present...
Proceedings Papers

Proc. ASME. GT2007, Volume 4: Turbo Expo 2007, Parts A and B, 661-670, May 14–17, 2007
Paper No: GT2007-27850
... techniques. The Reynolds number of the main flow based on the vane inlet velocity was fixed at Re C = 1.24×10 5 . The blowing ratio was 0.5, 1.0, or 2.0. The investigated endwall conditions before the vane entrance include a smooth endwall, an endwall with a forward-facing step, and an endwall...
Proceedings Papers

Proc. ASME. GT2005, Volume 3: Turbo Expo 2005, Parts A and B, 677-687, June 6–9, 2005
Paper No: GT2005-68783
...-stream. The three dimensional velocities are recorded using non-intrusive PIV, seeding is provided for both air streams. Two different cylindrical hole geometries are studied, with different angles. Blowing ratio is varied over a range to simulate pressure side film cooling. The three dimensional flow...
Proceedings Papers

Proc. ASME. GT2006, Volume 3: Heat Transfer, Parts A and B, 127-137, May 8–11, 2006
Paper No: GT2006-90166
... with different frequency and amplitude. The three dimensional velocities are recorded using non-intrusive PIV, seeding is provided for both air streams. Two different cylindrical hole geometries are studied, with different angles. Blowing ratio is varied over a range to simulate pressure side film cooling...