Numerical and Experimental Analysis of Total Hull Resistance on Floating Catamaran Pontoon for N219 Seaplanes based on Biomimetics Design with Clearance Configuration

Seaplanes are planes that can take off and land from the surface of water. Due to their ability to take off and land from the surface of water, seaplanes need a pair of pontoons in the form of a catamaran hull at the bottom of seaplanes so that the seaplanes can float above the surface of water. Research on the catamaran hull model was conducted to examine the effect of istiophorus platypterus design distance between hulls (clearance) variation on the total resistance of the catamaran hull model through experimental method and computational fluid dynamics (CFD) simulation method. There are three values of clearance (S/L) used in this research: 0.15, 0.2, and 0.25. The most optimal clearance configuration can be determined using a configuration which has the lowest total resistance. The results of experiments and simulations show that the distance between hull variations has a considerable effect on the total resistance of the catamaran hull model. The catamaran hull, which has the optimal clearance configuration, will cause the resulting wave interference and resistance to be small. The model was towed with Froude numbers ranging from 0.35 to 0.65. The results showed that hull separation made a difference in the total resistance coefficient on the same experiment configurations. The configurations with S/L 0.25 showed the least total resistance coefficient, whereas the configurations with the S/L 0.15 showed the highest total resistance coefficient. The simulations were conducted with the model with Froude numbers ranging from 0.35 to 0.65 using 700,000 cells in meshing and an error rate of 7.6% in convergence.