Assessment of classifcal and extended Messinger models for modeling rotorcraft icing phenomena

Abstract

Numerical studies have been performed to systematically assess the difference between the classical and extended Messinger model for ice accretion. A number of 2-D steady airfoil, 2-D oscillating airfoil, and 3-D rotor configurations have been studied from the ice accretion perspective. A suite of tools including a grid generator, flow solver, droplet convection model solver and an ice accretion modeling tool have been developed and coupled to each other using open I/O standards (PLOT3D format). The ice accretion is modeled using a classical Messinger model available within NASA LEWICE3D solver, and compared with an extended methodology developed in-house. Numerical results are presented and compared with experimental data for a variety of geometries of interest to rotorcraft industry.