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Rib Heat Transfer |
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Project Funded by: Pratt & Whitney |
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Researcher: Jason Ostanek |
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Internal cooling passages within gas turbine airfoils frequently employ extended surfaces to improve the heat transfer through the passage. Common extended surfaces within cooling passages include ribs, pin fins, and pedestals. It has been well documented that extended surfaces introduce secondary flows which augment heat transfer on adjacent walls. However, very few studies have published the heat transfer contribution from the extended surface itself. In this study, a ribbed channel will be used to develop several methodologies to quantify the heat transfer from the surface of the ribs. The heat transfer from the surface of the ribs will be quantified using a lumped-model approach to obtain a rib-averaged heat transfer coefficient. In addition to the lumped-model approach, a methodology will be developed to spatially resolve the heat transfer coefficient. |
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Figure 1. ANSYS model of rib heat transfer. |
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Temp ( °C ) |
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Figure 2. Closed loop, re-circulating wind tunnel designed to run steady state heat transfer tests. |