Convegni ATI - Accesso riservato soci CTI

Autore: T. Castiglione, W. He, F. Stern, S. Bova

Collana: CA - 66 - Rende 2011

Note:
The object of this study is the investigation of interference effects between the wave systems of a multi-hull vessel in the presence of shallow waters. The analysis is made numerically by the URANS code CFDSHIP-Iowa V.4 on the DELFT Catamaran model 372. The test matrix for numerical computations includes two separation distances (s=0.17;0.23) and the depth values of h/T=43.33 (deep water), 2.5 and 2, at several speeds ranging within Fn=0.27„i0.75. Our computations are in quite good agreement with EFD data from INSEAN and BSHC, with CT average comparison errors amounting to E=4.8%D and to E=11.3%D in deep and shallow water respectively. Results show that the presence of a finite depth increases significantly the ship total resistance, and its maximum occurs at lower speed values (0.3 0.5.