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Numerical and Experimental Investigation of the Aero-Hydrodynamic Effect on the Behavior of a High-Speed Catamaran in Calm Water

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Journal of Marine Science and Application 2022年第3期21卷 56-70页

作者： ali Ebrahimi Rouzbeh Shafaghat ali hajiabadi Mahdi Yousefifard Sea-Based Energy Research Group Babol Noshirvani University of TechnologyBabol 47148-73113Iran

In this paper,the effect of water and air fluids on the behavior of a planing catamaran in calm water was studied separately in calm water by using experimental and numerical *** were conducted in a towing tank over the Froude number range of 0.49–2.9 with two degrees of *** model vessel displacement of 5.3 kg was implemented in experimental *** behavior was evaluated at the displacements of 5.3,4.6,and 4 kg by using the numerical *** numerical simulation results for the hull’s resistance force were validated with similar experimental *** fluid volume model was applied to simulate two-phase *** SST k-ωturbulence model was used to investigate the effect of turbulence on the *** results showed that in the planing mode,the contribution of air to pressure resistance increased by 55%,40%,and 60%at the mentioned displacements,whereas the contribution of air to friction resistance was less than 15%on *** contribution of the air to the total lift force at the abovementioned displacements exceeded 70%,60%,and 50%in the planing mode but was less than 10%in the displacement *** the displacements of 5.3 and 4 kg,the area under the effect of maximum pressure moved around the center of gravity and caused porpoising longitudinal instability at the Froude numbers of 2.9 and 2.4,***,at the displacement of 4.6 kg,this effect did not occur,and the vessel maintained its stability.

关键词： Planing catamaran Calm water Experimental and numerical methods Pressure resistance Friction resistance Purposing longitudinal instability

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