Article
Unsteady Effects on Trailing Edge Cooling
Journal of Heat Transfer
(2005)
Abstract
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.
Keywords
- computer simulation,
- heat transfer,
- Reynolds number,
- turbines,
- turbomachine blades,
- Adiabatic effectiveness,
- edge cooling flows,
- surface jets,
- turbine blades,
- cooling
Disciplines
Publication Date
April, 2005
Citation Information
G. Medic and Paul A. Durbin. "Unsteady Effects on Trailing Edge Cooling" Journal of Heat Transfer Vol. 127 Iss. 4 (2005) Available at: http://works.bepress.com/paul_durbin/2/