Progress towards the development of a method for predicting the flowfield of an iced airfoil is described and shown to offer the prospect of a priori calculations of the effects of ice accretion and roughness on airfoil performance. The approach is based on interaction of inviscid flow solutions obtained by a panel method and improved upon by a finite-difference boundary-layer method which, operating in an inverse mode, incorporates viscous effects including those associate with separated flows. Results are presented for smooth, rough and iced airfoils as a function of angle of attack. Those for smooth and rough airfoils confirm the accuracy of the method and its applicability to surfaces with roughness similar to that associated with insect deposition and some forms of ince. Two procedures have been developed to deal with large ice accretion and their performance is examined and shown to be appropriate to the engineering requirements.
The calculation of flow over iced airfoils
Die Berechnung von Stroemungen ueber vereiste Tragfluegel
AIAA-Papers ; Jan ; 1-13
1988
13 Seiten, 28 Bilder, 27 Quellen
Conference paper
English
Calculation of Flow Over Iced Airfoils
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