Heat Transfer Measurements to a Gas Turbine Cooling Passage With Inclined Ribs

The local heat transfer coefficient distribution over all four walls of a large-scale model of a gas turbine cooling passage have been measured in great detail. A new method of determine the heat transfer coefficient to the rib surface has been developed and the contribution of the rib, at 5 percent...

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Bibliographic Details
Published in:Journal of turbomachinery 1998-01, Vol.120 (1), p.63-69
Main Authors: Wang, Z, Ireland, P. T, Kohler, S. T, Chew, J. W
Format: Article
Language:English
Subjects:
Applied sciences
Continuous cycle engines: steam and gas turbines, jet engines
Engines and turbines
Exact sciences and technology
Mechanical engineering. Machine design
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Summary:The local heat transfer coefficient distribution over all four walls of a large-scale model of a gas turbine cooling passage have been measured in great detail. A new method of determine the heat transfer coefficient to the rib surface has been developed and the contribution of the rib, at 5 percent blockage, to the overall roughened heat transfer coefficient was found to be considerable. The vortex-dominated flow field was interpreted from the detailed form of the measured local heat transfer contours. Computational Fluid Dynamics calculations support this model of the flow and yield friction factors that agree with measured values. Advances in the heat transfer measuring technique and data analysis procedure that confirm the accuracy of the transient method are described in full.
ISSN:0889-504X
1528-8900
DOI:10.1115/1.2841390