INITIAL VERIFICATION OF A 3D MORPHOGENETIC MODEL OF IN-FLIGHT ICING ON A CYLINDER

摘要

In this paper, we verify the results of a threedimensional morphogenetic model simulating rime and glaze ice accretion structures forming on a circular cylinder. Using a novel approach, we predict the shape and structural details of aircraft ice accretions by emulating the behaviour of individual fluid elements. In the model, the airflow and droplet trajectories are confined to planes perpendicular to the axis of a cylinder, but the resulting ice accretion is, nonetheless, fully three-dimensional. The model predicts rime, glaze and simultaneous glaze and rime accretions. A partial verification of the model has been accomplished and although there are discrepancies between experimental and predicted accretion shapes, the overall agreement is good. In particular, the prediction of the stagnation line growth rate agrees well with experimental data. This satisfactory verification suggests that morphogenetic modeling is a viable alternative for the simulation of in-flight icing. Practical implementation of this approach will require coupling the model to an external flow field solver as well as to heat transfer and droplet impingement solvers.