NASA NTRS · 20080004302
Porous airfoil and process
Abstract
A porous airfoil having venting cavities with contoured barrier walls, formed by a core piece, placed beneath a porous upper and lower surface area that stretches over the nominal chord of an airfoil is employed, to provide an airfoil configuration that becomes self-adaptive to very dissimilar flow conditions to thereby improve the lift and drag characteristics of the airfoil at both subcritical and supercritical conditions.
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Hartwich, Peter M.. 1992-12-01. Porous airfoil and process. https://ntrs.nasa.gov/citations/20080004302
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