Theoretical and experimental investigation of a catamaran resistance
A comparative theoretical and experimental analysis over catamaran resistance was developed in this paper. The theoretical estimation was performed on the basis of Sahoo method, typical for the round bilge catamarans with high speed. Experimental model tests were developed in the Towing Tank of “Dunarea de Jos” University of Galati, both with the demihull and the full catamaran, with blocked sinkage and trim, to study the influence of the hulls interference. Also, catamaran model tests with free trim were realized. In order to transpose the model results at full scale, the ITTC 1957 method was applied. The conclusions reveal significant differences between the theoretical and experimental results.
. ITTC Recommended Procedures and Guidelines 7.5-02.02.01, “Testing and Extrapolation Methods. Resistance Test”, 23rd ITTC, 2002.
. Molland, A.F., Wellicome, J.F., Couser, P.R., “Resistance experiments on a systematic series of high speed displacement catamaran forms: variation of lengthdisplacement ratio and breadth-draft ratio”, Ship Science Report, No. 71, University of Southampton, UK, 1994.
. Obreja, C.D., Chiracu, D.I., “Practical evaluation of high-speed round bilge catamaran resistance”, The Annals of “Dunarea de Jos” University of Galati, Galati University Press, pp. 21-26, 2015.
. Sahoo, P.K., Brown, N.A., Salas, M., “Experimental and CFD study of wave resistance of high-speed round bilge catamaran hull forms”, Proceedings of 4th International Euro Conference on High Performance Marine Vehicles, Rome, Italy, 2004.
. Sahoo, P.K., Salas, M., Schwetz, A., Practical evaluation of resistance of high-speed catamaran hull forms-part I”, Ships and offshore structures, Vol.2, Issue 4, pp. 307-324,