Publication de 18 numéros par an
ISSN Imprimer: 1064-2285
ISSN En ligne: 2162-6561
IF:
1.7
5-Year IF:
1.4
Immediacy Index:
0.6
Eigenfactor:
0.00072
JCI:
0.43
SJR:
0.318
SNIP:
0.568
CiteScore™::
3.5
H-Index:
28
Indexed in
Trailing Edge Film Cooling of Gas Turbine Airfoils — Effects of Ejection Lip Geometry on Film Cooling Effectiveness and Heat Transfer
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RÉSUMÉ
The present paper concentrates on trailing edge film cooling of modern high-pressure turbine blades using cooling ejection through planar slots with a pressure side cutback. The experimental test section consists of a generic scaled-up trailing edge model. The effects of different geometric configurations on the structure and the performance of the cooling film are investigated in terms of film cooling effectiveness, heat transfer coefficients, and discharge behavior. The interaction between an internal turbulator array of ribs with the ejection slot lip is of major interest. Different designs of the cooling ejection lip are applied. Four different ratios of lip thickness to ejection slot height (t/H = 0.2, 0.5, 1.0, 1.5) are investigated, as well as three different lip contours representing typical manufacturing imperfections and wear. The experiments are performed at engine-realistic density ratios. The blowing ratios are varied between 0.2 < M < 1.25. The results show a strong dependency on ejection lip thickness and only marginal changes when the lip shape is varied.
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Yao Yufeng, Effendy Warwan, Yao Jun, Comparison Study of Turbine Blade with Trailing-Edge Cutback Coolant Ejection Designs, 51st AIAA Aerospace Sciences Meeting including the New Horizons Forum and Aerospace Exposition, 2013. Crossref
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Ugolotti Matteo, Sharma Mayank, Williams Zachary, Owen Matthew, Ouwerkerk Justin, Balachandar Siddharth, Turner Mark G., Cooling System for 0.1 kN Thrust Micro-Engines: Concept Design Using Additive Manufacturing, 58th AIAA/ASCE/AHS/ASC Structures, Structural Dynamics, and Materials Conference, 2017. Crossref
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Gao Yan, Yan Xin, Li Jun, He Kun, Investigations into film cooling and unsteady flow characteristics in a blade trailing-edge cutback region, Journal of Mechanical Science and Technology, 32, 10, 2018. Crossref
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Ye Lin, Liu Cunliang, Liu Haiyong, Xie Gang, Study of Film Cooling Performance for Turbine Blade Trailing Edge with Different V-Shaped Rib Orientation, 2018 Joint Thermophysics and Heat Transfer Conference, 2018. Crossref
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Khalil Ahmed, Kayed Hatem, Hanafi Abdallah, Nemitallah Medhat, Habib Mohamed, Numerical Predictions of Three-Dimensional Unsteady Turbulent Film-Cooling for Trailing Edge of Gas-Turbine Blade Using Large Eddy Simulation, Journal of Energy Resources Technology, 141, 4, 2019. Crossref
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Ye Lin, Liu Cun-liang, Zhang Fan, Li Ji-chen, Zhou Tian-liang, Effect of the multiple rows of pin-fins on the cooling performance of cutback trailing-edge, International Journal of Heat and Mass Transfer, 170, 2021. Crossref
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Wang Ruiqin, He Xiao, Yan Xin, Spectral proper orthogonal decomposition analysis of trailing edge cutback film cooling flow, Physics of Fluids, 34, 10, 2022. Crossref