Improved roughness model in ice accretion prediction

Date

2025-8-28

Author

Dursun, Anıl

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This study explores advanced numerical methods to enhance the accuracy of ice accretion prediction techniques under varying atmospheric conditions. Specifically, it investigates approaches related to surface roughness modeling, smooth and rough zone characterization, and their effects on convective heat transfer coefficient distribution. The computational methodology begins by calculating the flow field around the airfoil using the Hess-Smith panel method, then applies the Lagrangian approach to track droplet trajectories and computes droplet collection efficiency distribution on the surface. Ice accretion rates are subsequently estimated through a thermodynamic balance using the Extended Messinger Method, following the evaluation of convective heat transfer distribution via the Integral Boundary Layer Method. The adequacy of icing prediction is evaluated under high-speed operating conditions. The results are compared with those in the literature, though further improvements are still needed.

Subject Keywords

Atmospheric icing, Roughness height, Smooth zone, Rough zone, Convective heat transfer, Extended messinger model

URI

https://hdl.handle.net/11511/116056

Collections

Graduate School of Natural and Applied Sciences, Thesis