Three-dimensional Ice Accretion Using Revised Myers Model

摘要

Ice accretion and water film flow on an arbitrary three-dimensional surface are the essential factors that influence the precision of ice simulation. The Myers icing model in which the water film flow equations are coupled with ice growth equations is revised and used to perform the simulation successfully. The revision mainly includes the determination of the transition from rime ice to glaze ice. The transition is determined by both its ice thickness and water flux in the revised model which can remove unreasonable ice horn and improve ice calculation result. Also, an effective numerical scheme for water film is presented. Glaze ice calculation results of a two-dimensional NACA0012 airfoil and three-dimensional GLC-305 swept wing are presented and compared with experimental ice shape to validate its accuracy. The calculation results show major characteristics of glaze ice and agree well with the experimental results. Compared with the LEWICE results, the current method is more suitable for calculating runback ice accretion, but it has disadvantages while predicting ice horn growth.