Computational predictions of endwall film-cooling for a first stage vane

Daniel G. Knost, Karen A. Thole

Research output: Contribution to conferencePaper

16 Scopus citations

Abstract

In gas turbine development, the direction has been higher turbine Met temperatures to increase the work output and thermal efficiency. This extreme environment can significantly impact component life. One means of preventing component burnout in the turbine is to effectively use film-cooling whereby coolant is extracted from the compressor and injected through component surfaces. One such surface is the endwall of the first stage nozzle guide vane. This paper presents results from a computational study of two endwall film-cooling hole patterns combined with cooling from a flush slot that simulates leakage between the combustor and turbine sections. Results indicate reasonable agreement between predictions and measurements of the turbine endwall cooling for a flush slot alone. Effectiveness predictions showed an increase in film-cooling flow was needed for both hole patterns to insure coolant was present near the pressure side of the vane. Results also indicated that superposition overpredicted the effectiveness levels along the endwall for the combined endwall film-cooling and slot cooling configurations.

Original languageEnglish (US)
Pages163-173
Number of pages11
DOIs
Publication statusPublished - Dec 1 2003
Event2003 ASME Turbo Expo - Atlanta, GA, United States
Duration: Jun 16 2003Jun 19 2003

Other

Other2003 ASME Turbo Expo
CountryUnited States
CityAtlanta, GA
Period6/16/036/19/03

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All Science Journal Classification (ASJC) codes

  • Engineering(all)

Cite this

Knost, D. G., & Thole, K. A. (2003). Computational predictions of endwall film-cooling for a first stage vane. 163-173. Paper presented at 2003 ASME Turbo Expo, Atlanta, GA, United States. https://doi.org/10.1115/GT2003-38252