A Third-generation In-flight Icing Code: FENSAP-ICE-Unsteady

Document Number: 2007-01-3339

Date Published: September 2007

Author(s):
Cristhian Aliaga - Newmerical Technologies International
Martin S. Aubé - Newmerical Technologies International
Guido Baruzzi - Newmerical Technologies International
Wagdi G. Habashi - McGill University
Sivakumaran Nadarajah - McGill University

Abstract:
Ice accretion is a purely unsteady phenomenon that is presently approximated by most icing codes using quasi-steady modelling. The accuracy of ice prediction is thus directly related to the prescribed time step, or the time span during which the impact of ice growth on both flow and droplets can be neglected. Such approximation is removed by FENSAP-ICE-Unsteady which fully couples in time a diphasic flow (interacting air and droplet particles) with ice accretion. The two-phase flow is solved using the Navier-Stokes and Eulerian droplet equations, while the water film characteristics and ice shape are obtained from the conservation of mass and energy within a thin film layer. The iced surface being constantly displaced in time, Arbitrary Lagrangian-Eulerian terms are added to the governing equations to account for mesh movement. For rime ice, numerical results show that full unsteady modelling improves the accuracy of ice prediction when compared to one-shot ice accretion. The applicability of the icing model for predicting glaze ice accretion is also demonstrated.

File Size: 256K
Product Status: In Stock

Included in: V116-2007

See other papers presented at 2007 SAE Aircraft and Engine Icing International Conference, September 2007, Seville, SPAIN, Session: In-flight Icing Simulation - CFD Part II

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