Numerical Study of Particle Impingement on Aeroengine under Mixed-Phase Conditions

Abstract

In this approach, considering to ice crystal sticking effects, a numerical model was established to solve the particle impingement property of a large bypass ratio aeroengine under mixed-phase icing conditions. The collection efficiency of droplets obtained by the proposed model is are well in agreement with the literature and the collection efficiency of ice crystals is significantly higher than that of droplets due to the greater inertial force. The mechanism of liquid film acting on the ice crystal adhesion affect was investigated. It is found that the greater melt ratio can lead to more sufficient liquid water and more extended wetting limit, which have more significant capability of sticking ice crystals. Meanwhile, due to ice crystals subjected to centrifugal force, the sticking coefficient of ice crystal will cliff-like drop, and the cliff-like effect is more pronounced accompanied by the greater centrifugal force.