Numerical simulation of super-cooled large droplet icing on commercial axial fan blade
Icing simulation of super-cooled large droplet on a commercial axial fan is performed. It is well-known that the SLD icing has the characteristic behavior i.e. splash-bounce, deformation, and breakup of the SLD droplet, and the computational models are introduced to reproduce the SLD-characteristic behavior. The effect of the models on the icing was investigated. A weak coupling between flow field and motion of the SLD droplet is employed: the Eulerian and Lagrangian methods are used to simulate the flow field and droplet, respectively. An extended Messinger model is used for thermodynamic computation of the icing. To validate numerical results, we make a SLD icing simulation of a NACA0012 airfoil. The ice shape and collection efficiency reasonably agree with the existing experimental data. The splash and bounce events considerably influence the icing phenomena, whereas the effects of deformation are negligibly small.