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Mathematical models of engine ice crystal icing
In the last decade, ice crystal accretion on the interior surfaces of aircraft engines has been studied. Existing knowledge on the mechanism of ice crystal build-up within the hot engine core is still limited, although some models have been recently developed. In this talk, we discuss the derivation and study of a multi-phase mathematical model of ice and water accretion over a flat plate, subject to a combination of flow and ice/water flux conditions above the plate. The spatial variation and movement of the initial water layer is modelled using thin-film equations, which are then coupled with a transient heat transfer model in order to determine the onset of ice formation. The effects of the moving- and non-uniform film shapes on the initial formation of the ice layer, are considered.