Dynamic Moment Model for Numerical Simulation of a 6-DOF Plate Trajectory around an Aircraft

Abstract

Ice shedding represents a threat to aircraft safety since ice blocks can strike rear components or can be ingested by engines. The accuracy of current numerical methods for predicting ice block paths in the design phase of an aircraft still need improvement. For the verification and validation of new trajectory calculation methods, shed blocks can be modelled for simplification as sphere or 6 Degree-Of-Freedom (6 DOF) plates. The objective of this paper is to propose a mathematical model for the dynamic moments of the plates and to use it to numerically simulate ice block paths. The results will be useful for verifying high-fidelity methods. Equations of motion in a Lagrangian frame are presented together with the correlations to be used for the aerodynamic coefficients of the ice blocks. The plate model involves the quaternions and a dynamic moment coefficient function of the angular velocity. After the model is validated with test cases obtained from the literature, the trajectories around the blended wing body will be plotted. The sensitivity of the trajectories and footprints to the chosen dynamic moment model will be highlighted.

Surface Roughness in RANS Applied to Aircraft Ice Accretion Simulation: A Review

“…Ice accretion studies address the safety concerns induced by ice build-up on aircraft surfaces [83,84]. The studies apply to both ice-induced aerodynamic degradation [85,86] and shedding debris [87,88]. Initially carried out experimentally [38,45,89], ice accretion studies have been supplemented by numerical simulations with the increase of computational power [52,90,91].…”