Film cooling effectiveness of an advanced-louver cooling scheme for gas turbines

X. Z. Zhang, Ibrahim Hassan

Research output: Contribution to journalArticle

53 Citations (Scopus)

Abstract

A novel film-cooling scheme for high temperature gas turbine applications was introduced in this paper. Compared with the traditional circular hole, the new scheme combines both the advantages of traditional film cooling with those of impingement cooling. The hole that transports coolant fluid from the inside to the outside of the blade is designed in such a way that the coolant must go through a bend before exiting the blade, thus impinging on the blade material. This scheme is expected to produce the greatest coverage on the blade with the least amount of mixing and least possible amount of coolant A benchmark case of a traditional circular hole in a crossflow, the fundamental problem of film cooling, was employed to validate the present methodology with the jet liftoff effect clearly captured in the simulation. Turbulence was modeled using four different turbulence models, namely, k-ε (including its three variants), k-ω, Reynolds-stress, and Spalart-Alhnaras with different wall treatments. It was found that the proposed cooling scheme can prevent the jets from penetrating into the mainstream much better and provide more uniform protection on the surface, indicating that the proposed scheme yields superior performance.

Original languageEnglish
Pages (from-to)754-763
Number of pages10
JournalJournal of Thermophysics and Heat Transfer
Volume20
Issue number4
DOIs
Publication statusPublished - Oct 2006
Externally publishedYes

Fingerprint

louvers
film cooling
gas turbines
blades
coolants
cooling
impingement
Reynolds stress
turbulence models
high temperature gases
turbulence
methodology
fluids
simulation

ASJC Scopus subject areas

  • Condensed Matter Physics

Cite this

Film cooling effectiveness of an advanced-louver cooling scheme for gas turbines. / Zhang, X. Z.; Hassan, Ibrahim.

In: Journal of Thermophysics and Heat Transfer, Vol. 20, No. 4, 10.2006, p. 754-763.

Research output: Contribution to journalArticle

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