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• W1973281328 abstract "Film cooling of a symmetrical turbine-blade model by lateral and non-lateral injection from one row of holes placed on each side near the leading edge is calculated with a 3D finite-volume method on multi-block grids. For various blowing rates, the flow and temperature fields are predicted, and in particular the contours of film-cooling effectiveness on the blade surface, which are compared with measurements. Various versions of the k–ε turbulence model are employed: the standard model with wall functions (WF), a two-layer version resolving the viscous sublayer with a one-equation model and an anisotropy correction due to Bergeles et al. [Num. Heat Transfer 1 (1978) 217–242] which acts to promote the lateral turbulent exchange. The original Bergeles proposal is modified for application in the viscous sublayer. With the standard model, the lateral spreading of the temperature field is underpredicted, leading to averaged film-cooling effectiveness values that are too low. The situation is improved by using the Bergeles correction, especially when the modified correction is applied with the two-layer model (TLK). This yields effectiveness contours in reasonably good agreement with the measurements, but the laterally averaged effectiveness is not predicted in all cases with good accurary. However, the trend of the various influence parameters is reproduced correctly." @default.
• W1973281328 created "2016-06-24" @default.
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• W1973281328 date "2001-04-01" @default.
• W1973281328 modified "2023-09-27" @default.
• W1973281328 title "Three-dimensional flow and heat transfer calculations of film cooling at the leading edge of a symmetrical turbine blade model" @default.
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• W1973281328 doi "https://doi.org/10.1016/s0142-727x(00)00084-9" @default.
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