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Influence of Opposing Dilution Jets on Effusion Cooling
Volume 5A: Heat Transfer — Combustors; Film Cooling, 2021Abstract The gas turbine combustion process reaches gas temperatures that exceed the melting temperature of the combustor liner materials. Cooling the liner is critical to combustor durability and is often accomplished with double-walled liners that contain both impingement and effusion holes.
M. Riley Creer, Karen A. Thole
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Manufacturing of Effusion Cooled Combustors
SAE Technical Paper Series, 1991<div class="htmlview paragraph">Effusion cooled combustor designs for gas turbine engines offer improvements over traditional cooling approaches. The effusion technique, also known as transpiration, or multi-hole, employs minute cooling passages through the wall to be cooled.
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Conjugate Calculation of Effusion Cooling With Realistic Cooling Hole Geometries
Volume 3: Heat Transfer, Parts A and B, 2009Within 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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Predictions of Adiabatic Film Cooling Effectiveness for Effusion Film Cooling
Volume 4: Turbo Expo 2007, Parts A and B, 2007This paper presents computational predictions of adiabatic film cooling effectiveness for effusion cooling systems with 90° and 30° holes. Predictions are performed for a range of coolant injection mass flow rates per unit surface area, G, of 0.1kg/sm2 - 1.6 kg/sm2 for 90° holes with constant pitch-to-diameter ratio of X/D = 11 and 10 rows of holes and
Nadiahnor Md. Yusop +5 more
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Volume 7A: Heat Transfer — Combustors; Film Cooling, 2023
Abstract The development of ultra-compact combustors raises challenges regarding wall thermal management. This study aims to understand the behavior of a reacting flow interacting with a cooling air film generated by an effusion wall. Experiments are carried out in an optically-accessible test rig operating at atmospheric pressure, and ...
Xavier, Pradip +6 more
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Abstract The development of ultra-compact combustors raises challenges regarding wall thermal management. This study aims to understand the behavior of a reacting flow interacting with a cooling air film generated by an effusion wall. Experiments are carried out in an optically-accessible test rig operating at atmospheric pressure, and ...
Xavier, Pradip +6 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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Development of a Macroscopic CFD Model for Effusion Cooling Applications
Volume 4: Heat Transfer, Parts A and B, 2012A CFD model was developed for simulations of effusion cooled structures like combustor liners or turbine blades. The main problem in such simulations is the mesh size, since the inclusion of the effusion cooling holes in the mesh rapidly increases the mesh size, which leads to very high computational costs. The present model circumvents this problem by
Voigt, Stefan +2 more
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Local Heat/Mass Transfer Measurement on the Effusion Plate in Impingment/Effusion Cooling System
Volume 3: Heat Transfer; Electric Power; Industrial and Cogeneration, 2000The present study is conducted to investigate the local heat/mass transfer characteristics for flow through perforated plates. A naphthalene sublimation method is employed to determine the local heat/mass transfer coefficients on the effusion plate. Two parallel perforated plates are arranged in two different configurations: staggered and shifted in ...
Hyung Hee Cho, Dong Ho Rhee
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Experimental Investigations on Cooling Hole Diameters of an Impingement-Effusion Cooling System
Volume 5B: Heat Transfer, 2014Cooling holes are playing critical roles in the impingement-effusion cooling system. The present experimental investigation have studied the effects of the hole diameters on the cooling efficiency and discharge coefficient. The main flow was heated up via combustion, with a maximum outlet temperature 850K. Cooling air, on the other hand, is supplied by
Xiaopei Li +5 more
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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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