Скачать или смотреть CFD for 34th America's Cup in San Francisco

This set of movies shows some of the simulations performed by Cape Horn Engineering during the 34th America’s Cup (San Francisco, rigid wing 72 foot catamarans) for Team Artemis Racing.
The first 3 movies show 6 Degrees-of-Freedom simulations, where the full hydrodynamic is solved and the aerodynamic forces are inputs interpolated from accurate response surface models of the sail plan. All aerodynamic and hydrodynamic forces and moments, as represented by the coloured vectors, are balanced. The analysis was performed in 2012 when we were learning to ‘fly’ the AC 72 catamarans in the simulations, after TNZ demonstrated that was possible in reality.
The second simulation show the dynamics of the catamaran burying the bows after a perturbation simulating a wind gust is applied to the sail plan while she was sailing with the leeward hull just touching the water or ’skimming’. Boat speed drops abruptly and recovers soon after.
The third simulation shows the boat bearing away and accelerating and taking off into her foils. For this case the trajectory was given and the rudder was balancing the moments.
The last simulation shows water on deck for the catamaran running downwind and overtaking waves, burying one hull in the wave. The aim of this analysis was to assess the added drag due to the water hitting the forward beam and how to mitigate this effect with fairings. A very wet craft indeed!

These simulation were performed with the code STAR-CCM+ from Siemens Digital Industries.

Website: https://www.cape-horn-eng.com/
LinkedIn:   / cape-horn-engineering