Document Type

Article

Publication Version

Published Version

Publication Date

2-2009

Journal or Book Title

Journal of Fluids Engineering, Transactions of the ASME

Volume

131

Issue

2

First Page

0211021

Last Page

02110214

DOI

10.1115/1.3054287

Abstract

The cause of overprediction of cooling efficiency by unsteady Reynolds averaged simulations of turbine blade trailing edge cooling flow is investigated. This is due to the deficiency in the level of unsteady coherent energy very near to the wall. Farther from the wall, the Reynolds averaged simulation produces the correct level of mixing. Eddy simulations of the instantaneous turbulent eddying produce a close agreement to data on film effectiveness. In particular, they reproduce the reduction in cooling effectiveness toward the trailing edge that has been seen in experiments. The scale adaptive simulation model of Menter and Egorov (2005, "A Scale-Adaptive Simulation Modeling Using Two-Equation Models," AIAA Paper No. 2005-1095) is invoked for the eddy simulations.

Comments

This article is from Journal of Fluids Engineering 131 (2009): 021102, doi: 10.1115/1.3054287. Posted with permission.

Copyright Owner

ASME

Language

en

File Format

application/pdf

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