Abstract
Thomas Washington * and Mark Drela t MIT Department of Aeronautics and Astronautics Cambridge, MA 02139 A numerical tool for the study of airfoil ice accretion has been developed, combining current ice accretion technology with a multielement airfoil design/analysis routine. Particle trajectory integration is used to find the impinging water mass along the body. The method is based upon spatial stepping rather than the more common temporal stepping. A control volume formulation of the thermodynamics of ice growth is also outlined. Numerical ice accretion results are presented for three airfoils: a single-element case, and two multielement cases. The results indicate that multielement high-lift airfoils are inherently more sensitive to icing than single-element airfoils. This is primarily due t o the amplification of ice-caused boundary layer thickening in the presence of adverse pressure gradients.
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