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ISSN Druckformat: 1064-2285
ISSN Online: 2162-6561
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A Correlation-Based Methodology to Predict the Flow Structure of Flows Emanating from Cylindrical Holes with Application to Film Cooling
ABSTRAKT
This paper presents a methodology to predict the flow structure of cooling flows emanating from cylindrical film-cooling holes based on characteristic flow parameters. The dependence of the film-jet flow field on characteristic flow parameters, such as blowing ratio and density ratio, has been studied using a validated high-resolution computational fluid dynamics model of a film-cooled flat plate. For the film-jet flow structure, mathematical formulations have been developed based on physical and empirical considerations. Free coefficients in the proposed formulations have been adjusted using a least-square-fit method to match the results from the detailed flow simulations qualitatively and quantitatively. To establish a functional relationship between the least-square-fit coefficients and the film cooling parameters, models have been developed and optimized using analysis of variance. These models provide the capability to predict the proper choice of coefficients based on the film cooling parameters. The combination of coefficient models and mathematical formulations allows the prediction of the complete three-dimensional flow field of the film-jet-body in the vicinity of a film cooling ejection site.
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Kampe Tilman auf dem, Völker Stefan, Zehe Frank, A Model for Cylindrical Hole Film Cooling—Part I: A Correlation for Jet-Flow With Application to Film Cooling, Journal of Turbomachinery, 134, 6, 2012. Crossref
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Kampe Tilman auf dem, Völker Stefan, Sämel Torsten, Heneka Christian, Ladisch Helge, Schulz Achmed, Bauer Hans-Jörg, Experimental and Numerical Investigation of Flow Field and Downstream Surface Temperatures of Cylindrical and Diffuser Shaped Film Cooling Holes1, Journal of Turbomachinery, 135, 1, 2013. Crossref