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- W2009340040 abstract "Innovative cooling concepts and new applications of these concepts are used to permit operation of turbopropulsion engines at higher temperatures and with less cooling air for greatest engine performance. These cooling concepts can cause detrimental structural effects due to stress concentrations or high thermal gradients that must be predictable to be incorporated into engine designs. This study analytically predicts the stress concentration effects of various patterns of small, closely-spaced cooling holes drilled through a thin plate and subjected to a biaxial stress field that represents a gas turbine engine application. These predictions are then verified by photoelastic analysis of the cooling hole patterns. Three hole patterns, a symmetrical diamond pattern and two unsymmetric patterns, are examined. The individual cooling holes are circular and drilled at a 30 degree inclination off the surface which produces an elliptical appearance on the surface. Graphical representations of the peak stress concentration factors for a range of stress fields are presented as a result of this study. 2 refs." @default.
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- W2009340040 date "1992-02-03" @default.
- W2009340040 modified "2023-09-25" @default.
- W2009340040 title "Stress concentration effects of oblique holes in aspirated-cooled turbine engine liners" @default.
- W2009340040 doi "https://doi.org/10.2514/6.1992-1130" @default.
- W2009340040 hasPublicationYear "1992" @default.
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