Rotorcraft Icing

 Unsteadiness should be considered when analyzing the icing phenomenon on the moving body such as wind turbine, rotorcraft or UAM. However fully-unsteady numerical simulation requires huge computation resources to account both unsteady motion and ice growth on the surface. In an effort to alleviate computational cost in unsteady icing analysis, quasi-unsteady icing solver that combines the multi-step approach for ice shape growth with unsteady-icing solver is proposed. The quasi-unsteady approach results in more accurate ice shape prediction for 2D oscillating airfoil, and applied to 3D rotorcraft icing problem.

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• Figure 1. Rotorcraft fuseleage icing

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• Figure 2. Flowchart of quasi-unsteady icing algorithm

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• Figure 3. Advantage of quasi-unsteady icing algorithm

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• Figure 4. Validation of quasi-unsteady algorithm
  in 2D oscillating airfoil