The flow and heat transfer inside a short airfoil shaped turbine exhaust strut was studied experimentally and computationally. A combination of transient and steady IR thermographic techniques were used to measure the heat transfer, and showed that the streamwise evolution of the heat transfer could be reliably described using a power law type relationship. Steady RANS CFD using the realizable k-epsilon was unable to accurately predict the observed heat transfer, with the main limitations of the model being a) a fundamental inability to calculate secondary flows and b) an underestimation of the restriction on boundary layer growth rates imposed by the opposing walls. The experiments showed that heat transfer rates were much higher in thinner regions of the strut, and lower in thicker regions. The CFD predicted an essentially uniform heat transfer rate, independent of the local strut thickness.
Experimental and Computational Study of Flow and Heat Transfer Inside a Heated Exhaust Strut
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Crawford, J, & Birk, AM. "Experimental and Computational Study of Flow and Heat Transfer Inside a Heated Exhaust Strut." Proceedings of the ASME Turbo Expo 2015: Turbine Technical Conference and Exposition. Volume 2B: Turbomachinery. Montreal, Quebec, Canada. June 15–19, 2015. V02BT40A003. ASME. https://doi.org/10.1115/GT2015-42544
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