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Numerical Study of the Effect of Blowing Angle on Cooling Effectiveness of an Effusion Cooling
Volume 3: Turbo Expo 2004, 2004The paper numerically investigates the influences of the blowing angle α of coolant flow on the cooling effectiveness of effusion cooling of a plate. Nine cases were studied which cover three blowing angles of α = 30°, 60°, 90° and for each angle three blowing ratios of M = 0.5, 1.0, 2.0 are calculated, respectively.
Yaping Hu, Honghu Ji
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Impact of Swirl Flow on the Cooling Performance of an Effusion Cooled Combustor Liner
Volume 4: Heat Transfer, Parts A and B, 2012An experimental study on combustor liner cooling of modern direct lean injection (DLI) combustion chambers using coolant ejection from both effusion cooling holes and a starter film has been conducted. The experimental setup consists of a generic scaled three sector planar rig in an open loop hot gas wind tunnel, which has been described earlier in ...
Wurm, B. +3 more
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Volume 7: Heat Transfer: Combustors; Heat Transfer: Film Cooling
Abstract The conjugate cooling characteristics of effusion-cooled n-shaped holes, were compared with the combustor widely used cooling air pressure drop (ΔPcool) ranging from 0.08% to 1.90%. All plates were covered by a thermal barrier coating. The cooling effectiveness distribution correlates closely to the swirl impact.
Lu Xiang +4 more
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Abstract The conjugate cooling characteristics of effusion-cooled n-shaped holes, were compared with the combustor widely used cooling air pressure drop (ΔPcool) ranging from 0.08% to 1.90%. All plates were covered by a thermal barrier coating. The cooling effectiveness distribution correlates closely to the swirl impact.
Lu Xiang +4 more
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Predictions of Effusion Cooling With Conjugate Heat Transfer
Volume 5: Heat Transfer, Parts A and B, 2011This work involves CFD conjugate heat transfer modelling of the geometrical design influence on effusion cooling. Experimental data was modelled for the overall effusion film cooling effectiveness using Nimonic 75 walls with imbedded thermocouples. The Fluent CFD code was used to investigate the experimental configuration for a 10×10 square array of ...
Habeeb Idowu Oguntade +4 more
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CMC rocket combustion chamber with effusion cooling
54th International Astronautical Congress of the International Astronautical Federation, the International Academy of Astronautics, and the International Institute of Space Law, 2003New propulsion systems play a key role for future space transportation systems (STS). While high efficiency with respect to specific impulse is mandatory aspects concerning system design (complexity, manufacturing, weight), operating aspects (reusability, maintenance, high reliability and safety) and cost reduction attract increasing attention.
Hald, H. +3 more
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Effusion Cooled Combustor Liner Tiles With Modern Cooling Concepts: A Comparative Experimental Study
Volume 5B: Heat Transfer, 2016Advanced combustion techniques in aero engines require highly effective cooling schemes of combustor liners. One parameter affecting the cooling performance is the geometry of the cooling holes themselves. So far, the freedom in the design of cooling holes was limited due to the manufacturing techniques.
Jackowski, Thomas +4 more
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S-Bend Diffuser With Passive Effusion Cooling
Volume 5B: Heat Transfer, 2014This paper presents the results of an experimental study of passive effusion cooling in an S-bend channel with a diffuser. A previous paper showed the results for cold primary flow [1]. This paper deals with hot primary flow. The results show that different levels and locations of effusion injection significantly affect the primary flow field and the ...
B. C. N. Ng, A. M. Birk
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International Journal of Heat and Mass Transfer, 2019
Abstract This paper numerically investigates the effects of the film cooling hole diameter on the flow and heat transfer characteristics of the impingement/effusion cooling and double swirl/effusion cooling. Impingement jet arrays at three jet Reynolds numbers, 10,000, 15,000, 20,000, are employed.
Junfei Zhou +3 more
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Abstract This paper numerically investigates the effects of the film cooling hole diameter on the flow and heat transfer characteristics of the impingement/effusion cooling and double swirl/effusion cooling. Impingement jet arrays at three jet Reynolds numbers, 10,000, 15,000, 20,000, are employed.
Junfei Zhou +3 more
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Turbulence Modeling for the Numerical Simulation of Film and Effusion Cooling Flows
Volume 4: Turbo Expo 2007, Parts A and B, 2007RANS simulations are known to suffer from serious deficiencies in the prediction of jet in a crossflow (JCF) because of the high complexity of this kind of flow. Particularly, the coherent structures resulting from the interaction of the two flow streams are characterized by a highly unsteady and anisotropic behavior which hardly stresses the ...
FACCHINI, BRUNO, Bacci A.
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Volume 3: Heat Transfer, Parts A and B, 2009
Within Collaborative Research Center 561 “Thermally Highly Loaded, Porous and Cooled Multi-Layer Systems for Combined Cycle Power Plants” at RWTH Aachen University an effusion-cooled multi-layer plate configuration with seven staggered effusion cooling holes is investigated numerically by application of a 3-D in-house fluid flow and heat transfer ...
Dieter Bohn, Robert Krewinkel
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Within Collaborative Research Center 561 “Thermally Highly Loaded, Porous and Cooled Multi-Layer Systems for Combined Cycle Power Plants” at RWTH Aachen University an effusion-cooled multi-layer plate configuration with seven staggered effusion cooling holes is investigated numerically by application of a 3-D in-house fluid flow and heat transfer ...
Dieter Bohn, Robert Krewinkel
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