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Experimental Study of Vane Heat Transfer and Film Cooling at Elevated Levels of TurbulenceThis report documents the results of an experimental study on the influence of high level turbulence on vane film cooling and the influence of film cooling on vane heat transfer. Three different cooling configurations were investigated which included one row of film cooling on both pressure and suction surfaces, two staggered rows of film cooling on both suction and pressure surfaces, and a shower-head cooling array. The turbulence had a strong influence on film cooling effectiveness, particularly on the pressure surface where local turbulence levels were the highest. For the single row of holes, the spanwise mixing quickly reduced centerline effectiveness levels while mixing in the normal direction was more gradual. The film cooling had a strong influence on the heat transfer in the laminar regions of the vane. The effect of film cooling on heat transfer was noticeable in the turbulent regions but augmentation ratios were significantly lower. In addition to heat transfer and film cooling, velocity profiles were taken downstream of the film cooling rows at three spanwise locations. These profile comparisons documented the strong spanwise mixing due to the high turbulence. Total pressure exit measurements were also documented for the three configurations.
Document ID
19970001773
Document Type
Contractor Report (CR)
Authors
Ames, Forrest E. (Allison Engine Co. Indianapolis, IN United States)
Date Acquired
September 6, 2013
Publication Date
September 1, 1996
Subject Category
Fluid Mechanics and Heat Transfer
Report/Patent Number
E-10419
NASA-CR-198525
NAS 1.26:198525
Funding Number(s)
CONTRACT_GRANT: NAS3-25950
PROJECT: RTOP 505-62-10
Distribution Limits
Public
Copyright
Work of the US Gov. Public Use Permitted.

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