Computational design and experimental evaluation of using a leading edge fillet on a gas turbine vane

G. A. Zess, K. A. Thole

Research output: Chapter in Book/Report/Conference proceedingConference contribution

27 Citations (Scopus)

Abstract

With the desire for increased power output for a gas turbine engine comes the continual push to achieve higher turbine inlet temperatures. Higher temperatures result in large thermal and mechanical stresses particularly along the nozzle guide vane. One critical region along a vane is the leading edge-end-wall juncture. Based on the assumption that the approaching flow to this juncture is similar to a two-dimensional boundary layer, previous studies have shown that a horseshoe vortex forms. This vortex forms because of a radial total pressure gradient from the approaching boundary layer. This paper documents the computational design and experimental validation of a fillet placed at the leading edge-end-wall juncture of a guide vane to eliminate the horseshoe vortex. The fillet design effectively accelerated the incoming boundary layer thereby mitigating the effect of the total pressure gradient. To verify the CFD studies used to design the leading edge fillet, flow field measurements were performed in a largescale, linear, vane cascade. The flow field measurements were performed with a laser Doppler velocimeter in four planes orientated orthogonal to the vane. Good agreement between the CFD predictions and the experimental measurements verified the effectiveness of the leading edge fillet at eliminating the horseshoe vortex. The flowfield results showed that the turbulent kinetic energy levels were significantly reduced in the endwall region because of the absence of the unsteady horseshoe vortex.

Original languageEnglish (US)
Title of host publicationHeat Transfer; Electric Power; Industrial and Cogeneration
PublisherAmerican Society of Mechanical Engineers (ASME)
ISBN (Print)9780791878521
DOIs
StatePublished - Jan 1 2001
EventASME Turbo Expo 2001: Power for Land, Sea, and Air, GT 2001 - New Orleans, LA, United States
Duration: Jun 4 2001Jun 7 2001

Publication series

NameProceedings of the ASME Turbo Expo
Volume3

Other

OtherASME Turbo Expo 2001: Power for Land, Sea, and Air, GT 2001
CountryUnited States
CityNew Orleans, LA
Period6/4/016/7/01

Fingerprint

Gas turbines
Vortex flow
Boundary layers
Pressure gradient
Flow fields
Computational fluid dynamics
Turbines
Laser Doppler velocimeters
Kinetic energy
Electron energy levels
Nozzles
Temperature

All Science Journal Classification (ASJC) codes

  • Engineering(all)

Cite this

Zess, G. A., & Thole, K. A. (2001). Computational design and experimental evaluation of using a leading edge fillet on a gas turbine vane. In Heat Transfer; Electric Power; Industrial and Cogeneration (Proceedings of the ASME Turbo Expo; Vol. 3). American Society of Mechanical Engineers (ASME). https://doi.org/10.1115/2001-GT-0404
Zess, G. A. ; Thole, K. A. / Computational design and experimental evaluation of using a leading edge fillet on a gas turbine vane. Heat Transfer; Electric Power; Industrial and Cogeneration. American Society of Mechanical Engineers (ASME), 2001. (Proceedings of the ASME Turbo Expo).
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Zess, GA & Thole, KA 2001, Computational design and experimental evaluation of using a leading edge fillet on a gas turbine vane. in Heat Transfer; Electric Power; Industrial and Cogeneration. Proceedings of the ASME Turbo Expo, vol. 3, American Society of Mechanical Engineers (ASME), ASME Turbo Expo 2001: Power for Land, Sea, and Air, GT 2001, New Orleans, LA, United States, 6/4/01. https://doi.org/10.1115/2001-GT-0404

Computational design and experimental evaluation of using a leading edge fillet on a gas turbine vane. / Zess, G. A.; Thole, K. A.

Heat Transfer; Electric Power; Industrial and Cogeneration. American Society of Mechanical Engineers (ASME), 2001. (Proceedings of the ASME Turbo Expo; Vol. 3).

Research output: Chapter in Book/Report/Conference proceedingConference contribution

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Zess GA, Thole KA. Computational design and experimental evaluation of using a leading edge fillet on a gas turbine vane. In Heat Transfer; Electric Power; Industrial and Cogeneration. American Society of Mechanical Engineers (ASME). 2001. (Proceedings of the ASME Turbo Expo). https://doi.org/10.1115/2001-GT-0404