Oblique holes are frequently used to provide cooling passages in various jet engine parts, such as combustors or hollow airfoils. It is often desirable to have the axes of such holes machined at a small oblique angle relative to the hardware surface. The frozen-stress photoelastic studies reported in this paper were part of the design process on cooled combustors. In relation to previous analyses, this paper presents relatively small oblique angles between the hole axis and the plate surface, relatively large thickness to diameter ratios, and a staggered pattern of holes. Both tensile and bending loads were applied. The most notable effects revealed were the unexpectedly high values and rates of increase in the highly localized concentrations as the oblique angle decreases. Results are compared with those of previous investigators.
Photoelastic stress analysis of a pattern of oblique holes in jet engine hardware
Spannungsoptische Prüfung eienr Reihe schräger Bohrungen in einem Flugzeugtriebwerk
International Congress on Experimental Mechanics, 7 ; 1 ; 550-555
1992
6 Seiten, 9 Bilder, 14 Quellen
Aufsatz (Konferenz)
Englisch
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