Further Application of the Mass Loss Model to the GLC-305 and MS(1)-317 Airfoils

A model to simulate the mass loss due to splashing by large droplets impinging on an airfoil surface has been developed and successful validated for a single airfoil¹: MS(1)-317 at angle of attack (AOA) of 0°. The published results on the comparison between experimental and predicted droplet impingement efficiency values have shown good agreement. Droplet impingement characteristic is essential for simulating ice shapes. Although current icing codes can predict ice buildup for Appendix C droplet sizes with acceptable degree of accuracy, they were less successful with supercooled large droplets (SLD) due to the droplet splashing effects. The proposed mass loss model accounts for this effect by including a splash parameter term into the computation of the droplet impingement efficiency. This parameter is a function of the droplet median volume diameter (MVD) and impact parameter (K), which is related to the droplet impact velocity (and angle). This paper presents further application of this mass loss model to the MS(1)-317 airfoil at AOA of 8°, and the GLC-305 airfoil at AOA of 1.5°.