It is shown how natural and forced unsteadiness play a major role in turbine blade trailing edge cooling flows. Reynolds averaged simulations are presented for a surface jet in coflow, resembling the geometry of the pressure side breakout on a turbine blade. Steady computations show very effective cooling; however, when natural—or even moreso, forced—unsteadiness is allowed, the adiabatic effectiveness decreases substantially. Streamwise vortices in the mean flow are found to be the cause of the increased heat transfer.
Unsteady Effects on Trailing Edge Cooling
Manuscript received January 21, 2003; revision received November 8, 2004. Review conducted by: S. Acharya.
Medic , G., and Durbin , P. A. (March 30, 2005). "Unsteady Effects on Trailing Edge Cooling ." ASME. J. Heat Transfer. April 2005; 127(4): 388–392. https://doi.org/10.1115/1.1860565
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