Title

Numerical Investigation Of Adiabatic And Conjugate Film Cooling Effectiveness On A Single Cylindrical Film-Cooling Hole

Abstract

This paper documents a computational investigation of the film-cooling effectiveness of a 3-D gas turbine endwall with one cylindrical cooling hole. The simulations were performed for an adiabatic and conjugate heat transfer models. Turbulence closure was investigated using five different turbulence models; the standard k-ε model, the RNG k-ε model, the realizable k-ε model, the standard k-ω model, as well as the SST k-ω model. Results were obtained for a blowing ratio of 2.0, and a coolant-to-mainflow temperature ratio of 0.54. The simulations used a dense, high quality, O-type, hexahedral grid. The computed flow/temperature fields are presented, in addition to local, two-dimensional distribution of film cooling effectiveness for the adiabatic and conjugate cases. Results are compared to experimental data in terms of centerline film cooling effectiveness downstream cooling-hole, the predictions with realizable k-ε turbulence model exhibited the best agreement especially in the region for (x / D ≤ 6). All turbulence models predicted the jet lift-off. Also, the results show the effect of the conjugate heat transfer on the temperature (effectiveness) field in the film-cooling hole region and, thus, the additional heating up of the cooling jet itself. Copyright © 2004 by ASME.

Publication Date

1-1-2004

Publication Title

American Society of Mechanical Engineers, Heat Transfer Division, (Publication) HTD

Volume

375

Issue

1

Number of Pages

333-343

Document Type

Article; Proceedings Paper

Personal Identifier

scopus

DOI Link

https://doi.org/10.1115/IMECE2004-62196

Socpus ID

20344405001 (Scopus)

Source API URL

https://api.elsevier.com/content/abstract/scopus_id/20344405001

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