Experimental results are presented for a double wall cooling arrangement which simulates a portion of a combustor liner of a gas turbine engine. The results are collected using a new experimental facility designed to test full coverage film cooling and impingement cooling effectiveness using either cross flow, impingement, or a combination of both to supply the film cooling flow. The present experiment primarily deals with cross flow supplied full coverage film cooling for a sparse film cooling hole array that has not been previously tested. Data are provided for turbulent film cooling, contraction ratio of 1, blowing ratios ranging from 2.7 to 7.5, coolant Reynolds numbers based on film cooling hole diameter of about 5,000–20,000, and mainstream temperature step during transient tests of 14 °C. The film cooling hole array consists of a film cooling hole diameter of 6.4 mm with non-dimensional streamwise (X/de) and spanwise (Y/de) film cooling hole spacing of 15 and 4, respectively. The film cooling holes are streamwise inclined at an angle of 25 degrees with respect to the test plate surface and have adjacent streamwise rows staggered with respect to each other. Data illustrating the effects of blowing ratio on adiabatic film cooling effectiveness and heat transfer coefficient are presented. For the arrangement and conditions considered, heat transfer coefficients generally increase with streamwise development, and increase with increasing blowing ratio. The adiabatic film cooling effectiveness is determined from measurements of adiabatic wall temperature, coolant stagnation temperature, and mainstream recovery temperature. The adiabatic wall temperature and adiabatic film cooling effectiveness generally decrease and increase, respectively, with streamwise position, and generally decrease and increase, respectively, as blowing ratio becomes larger.
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ASME Turbo Expo 2016: Turbomachinery Technical Conference and Exposition
June 13–17, 2016
Seoul, South Korea
Conference Sponsors:
- International Gas Turbine Institute
ISBN:
978-0-7918-4978-1
PROCEEDINGS PAPER
Effects of Double Wall Cooling Configuration and Conditions on Performance of Full Coverage Effusion Cooling
Nathan Rogers,
Nathan Rogers
University of Alabama in Huntsville, Huntsville, AL
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Zhong Ren,
Zhong Ren
University of Alabama in Huntsville, Huntsville, AL
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Warren Buzzard,
Warren Buzzard
University of Alabama in Huntsville, Huntsville, AL
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Brian Sweeney,
Brian Sweeney
University of Alabama in Huntsville, Huntsville, AL
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Nathan Tinker,
Nathan Tinker
University of Alabama in Huntsville, Huntsville, AL
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Phil Ligrani,
Phil Ligrani
University of Alabama in Huntsville, Huntsville, AL
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Keith Hollingsworth,
Keith Hollingsworth
University of Alabama in Huntsville, Huntsville, AL
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Fred Liberatore,
Fred Liberatore
Solar Turbines, Inc., San Diego, CA
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Rajeshriben Patel,
Rajeshriben Patel
Solar Turbines, Inc., San Diego, CA
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Hee-Koo Moon
Hee-Koo Moon
Solar Turbines, Inc., San Diego, CA
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Nathan Rogers
University of Alabama in Huntsville, Huntsville, AL
Zhong Ren
University of Alabama in Huntsville, Huntsville, AL
Warren Buzzard
University of Alabama in Huntsville, Huntsville, AL
Brian Sweeney
University of Alabama in Huntsville, Huntsville, AL
Nathan Tinker
University of Alabama in Huntsville, Huntsville, AL
Phil Ligrani
University of Alabama in Huntsville, Huntsville, AL
Keith Hollingsworth
University of Alabama in Huntsville, Huntsville, AL
Fred Liberatore
Solar Turbines, Inc., San Diego, CA
Rajeshriben Patel
Solar Turbines, Inc., San Diego, CA
Hee-Koo Moon
Solar Turbines, Inc., San Diego, CA
Paper No:
GT2016-56515, V05AT13A005; 17 pages
Published Online:
September 20, 2016
Citation
Rogers, N, Ren, Z, Buzzard, W, Sweeney, B, Tinker, N, Ligrani, P, Hollingsworth, K, Liberatore, F, Patel, R, & Moon, H. "Effects of Double Wall Cooling Configuration and Conditions on Performance of Full Coverage Effusion Cooling." Proceedings of the ASME Turbo Expo 2016: Turbomachinery Technical Conference and Exposition. Volume 5A: Heat Transfer. Seoul, South Korea. June 13–17, 2016. V05AT13A005. ASME. https://doi.org/10.1115/GT2016-56515
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