Numerical Investigation of Roughness-Heat Transfer Interaction Within Icing Code With a Novel Roughness Model

Ice roughness modeling is crucial for accurately predicting iced airfoils, as it involves predicting the enhancement of convective heat transfer on rough surfaces. The challenge of accurately predicting roughness lies in the interaction between surface roughness and local heat convection, independently computed through icing code. During this study, numerical analysis was conducted to explore the circulatory relationship between surface roughness caused by freezing and local convective heat transfer, resulting in ice accretion on the surface. The roughness model considers the local roughness distribution and its effect on convective heat transfer with RANS-based icing code, and the paper delves into the aerodynamic implications of surface roughness on the boundary layer characteristics of airfoils under icing conditions. By improving the predictive accuracy of ice accretion models with the advanced roughness model, the paper seeks to inspire the design of more efficient de-icing and anti-icing systems, improving aviation safety and performance.