Flowfield measurements for a highly turbulent flow in a stator vane passage

R. W. Radomsky, K. A. Thole

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

6 Scopus citations

Abstract

Turbine vanes experience high convective surface heat transfer as a consequence of the turbulent flow exiting the combustor. Before improvements to vane heat transfer predictions through boundary layer calculations can be made, we need to understand how the turbulent flow in the inviscid region of the passage reacts as it passes between two adjacent turbine vanes. In this study, a scaled-up turbine vane geometry was used in a low-speed wind tunnel simulation. The test section included a central airfoil with two adjacent vanes. To generate the 20% turbulence levels at the entrance to the cascade, which simulates levels exiting the combustor, an active grid was used. Three-component laser Doppler velocimeter measurements of the mean and fluctuating quantities were measured in a plane at the vane mid-span. Coincident velocity measurements were made to quantify Reynolds shear stress and correlation coefficients. The energy spectra and length scales were also measured to give a complete set of inlet boundary conditions that can be used for numerical simulations. The results show that the turbulent kinetic energy throughout the inviscid region remained relatively high. The surface heat transfer measurements indicated high augmentation near the leading edge as well as the pressure side of the vane as a result of the elevated turbulence levels.

Original languageEnglish (US)
Title of host publicationHeat Transfer; Electric Power; Industrial and Cogeneration
PublisherAmerican Society of Mechanical Engineers (ASME)
ISBN (Electronic)9780791878606
DOIs
StatePublished - Jan 1 1999
EventASME 1999 International Gas Turbine and Aeroengine Congress and Exhibition, GT 1999 - Indianapolis, United States
Duration: Jun 7 1999Jun 10 1999

Publication series

NameProceedings of the ASME Turbo Expo
Volume3

Other

OtherASME 1999 International Gas Turbine and Aeroengine Congress and Exhibition, GT 1999
CountryUnited States
CityIndianapolis
Period6/7/996/10/99

All Science Journal Classification (ASJC) codes

  • Engineering(all)

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    Radomsky, R. W., & Thole, K. A. (1999). Flowfield measurements for a highly turbulent flow in a stator vane passage. 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/10.1115/99-GT-253