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Keywords: film cooling
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Journal Articles
Article Type: Research Papers
J. Turbomach. September 2022, 144(9): 091005.
Paper No: TURBO-20-1191
Published Online: March 4, 2022
...Chen Li; Baitao An; Jianjun Liu The coolant flow condition at the film hole entrance has a notable effect on film cooling effectiveness. The previous studies about internal ribbed crossflow effects are the hole with a circular inlet cross section. In this study, a diffusion slot hole with a race...
Journal Articles
Article Type: Research Papers
J. Turbomach. September 2022, 144(9): 091001.
Paper No: TURBO-21-1147
Published Online: March 4, 2022
...Matthew J. Horner; Christopher Yoon; Michael Furgeson; Todd A. Oliver; David G. Bogard Few studies in the open literature have studied the effect of thermal barrier coatings (TBC) when used in combination with shaped hole film cooling and enhanced internal cooling techniques. The current study...
Journal Articles
Article Type: Research Papers
J. Turbomach. August 2022, 144(8): 081013.
Paper No: TURBO-21-1210
Published Online: March 4, 2022
... [5] Heidmann , J. D. , and Hunter , S. D. , 2001 , “ Coarse Grid Modeling of Turbine Film Cooling Flows Using Volumetric Source Terms ,” Volume 3: Heat Transfer; Electric Power; Industrial and Cogeneration , 78521 . 10.1115/2001-GT-0138 [6] Burdet , A. , Abhari , R. S...
Journal Articles
Article Type: Research Papers
J. Turbomach. May 2022, 144(5): 051002.
Paper No: TURBO-21-1082
Published Online: November 15, 2021
... film cooling turbine blade tip measurement advancements In high-pressure turbines (HPT), complex over-tip-leakage (OTL) flow occurs within the clearance gap between the rotor blade and the casing. Previous studies indicate that there are significant changes in the OTL flow field due...
Journal Articles
Article Type: Research Papers
J. Turbomach. April 2022, 144(4): 041006.
Paper No: TURBO-21-1054
Published Online: November 5, 2021
...Haifeng Xing; Lei Luo; Wei Du; Songtao Wang The direct prediction model for adiabatic film cooling effectiveness distribution and inverse prediction model for design parameters are studied in this article. Convolutional neural networks (CNNs) are trained on a set of simulated adiabatic film cooling...
Journal Articles
Article Type: Research Papers
J. Turbomach. March 2022, 144(3): 031008.
Paper No: TURBO-21-1075
Published Online: October 5, 2021
... be increased by decreasing the lens aperture, this approach is impractical as a large aperture is essential to maintain an acceptable signal-to-noise ratio (SNR). To solve these problems in the optical aerothermal measurements of film-cooled gas turbine blades, an approach combining the focal-sweep method...
Journal Articles
Article Type: Research Papers
J. Turbomach. January 2022, 144(1): 011012.
Paper No: TURBO-21-1044
Published Online: September 21, 2021
.... A. , 2006 , “ Gas Turbine Film Cooling ,” J. Propul. Power , 22 ( 2 ), pp. 249 – 270 . 10.2514/1.18034 [2] Denton , J. D. , 1993 , “ Loss Mechanisms in Turbomachines ,” ASME J. Turbomach. , 115 ( 4 ), pp. 621 – 656 . 10.1115/1.2929299 [3] Azad , G. S. , Han , J. C...
Journal Articles
Article Type: Research Papers
J. Turbomach. December 2021, 143(12): 121009.
Paper No: TURBO-20-1347
Published Online: July 14, 2021
... involves an engine-representative combustor–turbine interface geometry, combustor coolant flow, and endwall film cooling flow injected upstream of a linear cascade. The approach flow conditions represent flow exiting a cooled, low-NOx combustor. This first part of this two-part study aims to understand...
Journal Articles
Article Type: Research Papers
J. Turbomach. December 2021, 143(12): 121010.
Paper No: TURBO-21-1012
Published Online: July 14, 2021
...Mahmood H. Alqefl; Kedar P. Nawathe; Pingting Chen; Rui Zhu; Yong W. Kim; Terrence W. Simon Flow over gas turbine endwalls is complex and highly three-dimensional. As boundaries for modern engine designs are pushed, this already-complex flow is affected by aggressive application of film cooling...
Journal Articles
Article Type: Research Papers
J. Turbomach. November 2021, 143(11): 111010.
Paper No: TURBO-21-1037
Published Online: June 21, 2021
...] Bunker , R. S. , 2006 , “ Axial Turbine Blade Tips: Function, Design, and Durability ,” J. Propul. Power , 22 ( 2 ), pp. 271 – 285 . 10.2514/1.11818 [3] Kim , Y. W. , and Metzger , D. E. , 1995 , “ Heat Transfer and Effectiveness on Film Cooled Turbine Blade Tip Models ,” ASME J...
Journal Articles
Article Type: Research Papers
J. Turbomach. October 2021, 143(10): 101012.
Paper No: TURBO-20-1184
Published Online: May 19, 2021
...Zhen Zhang; Hui Li; Xinrong Su; Xin Yuan The performance of film cooling is influenced by many parameters, and the nonuniform flow caused by the internal cooling system is found to largely affect the film cooling, which further complicates the in-hole flow and draws new difficulties in predicting...
Journal Articles
Article Type: Research Papers
J. Turbomach. June 2021, 143(6): 061012.
Paper No: TURBO-20-1301
Published Online: April 9, 2021
... down facility consisting of five vanes was used. The film cooling effectiveness was measured using binary pressure-sensitive paint (BPSP). The mainstream flow was set using isentropic exit Mach numbers of 0.7 and 0.9. The coolant-to-mainstream density ratio varied from 1.0 to 2.0. The coolant...
Journal Articles
Article Type: Research Papers
J. Turbomach. May 2021, 143(5): 051009.
Paper No: TURBO-20-1245
Published Online: April 7, 2021
...Zhiqiang Yu; Jianjun Liu; Chen Li; Baitao An; Guangyao Xu This paper focuses on the influences of the discrete-hole shape and layout on the blade endwall film cooling effectiveness. The effect of upstream purge slot injection on the film cooling performance of the discrete hole was also...
Journal Articles
Article Type: Research Papers
J. Turbomach. April 2021, 143(4): 041005.
Paper No: TURBO-20-1096
Published Online: March 22, 2021
...Ziyu Chen; Yifei Li; Xinrong Su; Xin Yuan One-dimensional laterally averaged adiabatic film cooling effectiveness η ¯ l a t -based correlations have been widely employed in the cooling design of the modern gas turbine and aero-engine; however, the flow field of the discrete film cooling is fully...
Journal Articles
Article Type: Research Papers
J. Turbomach. March 2021, 143(3): 031004.
Paper No: TURBO-20-1224
Published Online: February 12, 2021
...Austin Click; Phillip M. Ligrani; Maggie Hockensmith; Joseph Knox; Chandler Larson; Avery Fairbanks; Federico Liberatore; Rajeshriben Patel; Yin-Hsiang Ho Within the present investigation, a louver slot is employed upstream of an array full-coverage film cooling holes. Cooling air is supplied using...
Journal Articles
Article Type: Research Papers
J. Turbomach. March 2021, 143(3): 031003.
Paper No: TURBO-20-1326
Published Online: February 12, 2021
... system of secondary flows near them that wash and disrupt the protective coolant films. This highly three-dimensional flow not only affects but is also affected by the momentum of film cooling flows, whether injected just upstream of the passage to intentionally cool the endwall or as combustor cooling...
Journal Articles
Article Type: Research Papers
J. Turbomach. January 2021, 143(1): 011008.
Paper No: TURBO-20-1204
Published Online: December 29, 2020
...Yu Xia; Patrick Sharkey; Stefano Orsino; Mike Kuron; Florian Menter; Ishan Verma; Robert Malecki; Baris Sen Accurate numerical prediction of surface heat transfer in the presence of film cooling within aero-engine sub-components, such as blade effusion holes and combustor liners, has long been...
Journal Articles
Article Type: Research Papers
J. Turbomach. January 2021, 143(1): 011002.
Paper No: TURBO-20-1077
Published Online: December 28, 2020
...Hongyi Shao; Mohamed Qenawy; Tianlun Zhang; Di Peng; Yingzheng Liu; Wenwu Zhou An experimental study was conducted to investigate the influence of mainstream oscillations on spatio-temporal variation of leading-edge film cooling effectiveness. The investigation utilized fast-response pressure...
Journal Articles
Article Type: Research Papers
J. Turbomach. January 2021, 143(1): 011001.
Paper No: TURBO-20-1091
Published Online: December 23, 2020
... Gas Turbine Engines ,” J. Eng. Gas Turbines Power. , 115 ( 3 ), pp. 641 – 651 . 10.1115/1.2906754 [5] Bunker , R. S. , 2000 , “ Effect of Partial Coating Blockage on Film Cooling Effectiveness ,” ASME Turbo Expo 2000: Power for Land, Sea, and Air, American Society of Mechanical...
Journal Articles
Article Type: Research Papers
J. Turbomach. September 2020, 142(9): 091011.
Paper No: TURBO-20-1060
Published Online: August 25, 2020
...J. Brind; G. Pullan The mechanisms of blade row interaction affecting rotor film cooling are identified to make recommendations for the design of film cooling in the real, unsteady turbine environment. Present design practice makes the simplifying assumption of steady boundary conditions despite...