The experimental study considered passive effusion cooling in an S-bend diffusing passage in which ambient cool air was drawn naturally into the S-bend passage with subatmospheric flow distributions. Seven-hole pressure probes were used to measure the test section’s inlet and outlet flow conditions which were used to evaluate the performance of the S-bend diffuser. Back-pressure, outlet flow-fields, and wall pressure distributions were investigated to study the effects of effusion cooling on the pressure recovery performance of the S-bend diffuser. The study revealed a substantial back-pressure penalty and wall pressure distribution alteration in the S-bend passage with full coverage effusion cooling. The outlet diffuser was shown to be not as effective with effusion cooling. The findings highlighted the importance of the design of effusion holes locations in complex flow passages.
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September 2012
Gas Turbines: Heat Transfer
Passive Effusion Cooling in a Rectangular S-Bend Diffuser
A. M. Birk
A. M. Birk
Department of Mechanical and Materials Engineering,
e-mail: birk@me.queensu.ca
Queen’s University, McLaughlin Hall
, Kingston, ON, K7L 3N6, Canada
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A. M. Birk
Department of Mechanical and Materials Engineering,
Queen’s University, McLaughlin Hall
, Kingston, ON, K7L 3N6, Canada
e-mail: birk@me.queensu.ca
J. Eng. Gas Turbines Power. Sep 2012, 134(9): 091901 (6 pages)
Published Online: July 23, 2012
Article history
Received:
June 17, 2012
Revised:
June 19, 2012
Online:
July 23, 2012
Published:
July 23, 2012
Citation
Ng, B. C. N., and Birk, A. M. (July 23, 2012). "Passive Effusion Cooling in a Rectangular S-Bend Diffuser." ASME. J. Eng. Gas Turbines Power. September 2012; 134(9): 091901. https://doi.org/10.1115/1.4006987
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