| Résumé | A full-scale spray flux equation has been derived for ship-generated spray using the spraying data obtained from model-scale experiments. Using this equation, trajectory modelling, and spray mass continuity, a full-scale spraying model, which includes the effect of wind drag, has been developed for the stern trawler Zandberg. This spraying model has been incorporated into an icing model for the same vessel. A three-dimensional grid cell mesh is superimposed on the surface of the ship so that the local spray flux and icing rate on each grid cell can be calculated using the combined spraying and icing model. the disappearance of the "Blue Mist II" is used as a case study to illustrate the performance of the icing model. Under these severe icing conditions with off-head winds, more than 13 tonnes of ice is accreted on the Zandberg in one hour and the ice distribution is highly asymmetrical. This ice loading condition is most dangerous for the ship's stability. |
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