CFD Based Sensitivity Analysis of Influencing Flow Parameters for Cylindrical and Shaped Holes in a Gas Turbine Vane
2012 (English)In: ASME Turbo Expo 2012: Turbine Technical Conference and Exposition, Volume 4: Heat Transfer, Parts A and B Copenhagen, Denmark, June 11–15, 2012, ASME Press, 2012, Vol. 4, 1501-1509 p.Conference paper (Refereed)
In this study a CFD based sensitivity analysis is performedincluding the flow parameter blowing ratio, the geometrical parametercooling hole shape and the effect of approaching flow(hole position), investigating the film cooling performance of areal vane configuration working at engine like conditions. Forthis purpose numerical results from the commercial CFD codeFLUENT using the Spalart-Allmaras turbulence model has beenvalidated versus experimental results on the same vane includingthe film cooling hole configurations. Blowing ratios ranging from(0.2-1.8) have been considered. In addition, film cooling performanceof rows of cooling holes at six different positions locatedaround the suction and pressure side of the vane are investigatedfor studying the influence of flow acceleration present in turbinevanes. These flow parameters are investigated for both cylindricaland fan-shaped holes. Investigations are performed at afixed unity density ratio. It has been found that for fan-shapedholes film cooling performance is higher for cooling holes locatedat positions whit a high accelerated flow. On the otherhand, film cooling performance of cylindrical holes are found tobe affected less by acceleration. Due to the low velocity and lowacceleration on the pressure side the hole position seems to haverelatively low influence on the cooling performance.
Place, publisher, year, edition, pages
ASME Press, 2012. Vol. 4, 1501-1509 p.
Computational Fluid Dynamics, Film Cooling, Fan-shaped Holes, Cylindrical Holes
Fluid Mechanics and Acoustics
IdentifiersURN: urn:nbn:se:liu:diva-116938DOI: 10.1115/GT2012-69023ISBN: 978-0-7918-4470-0OAI: oai:DiVA.org:liu-116938DiVA: diva2:801787
ASME Turbo Expo 2012, June 11-12, Copenhagen, Denmark
ProjectsTurbo Power Program