Abstract
ESTIMATION OF BARE HULL RESISTANCE OF A ROPAX VESSEL USING THE ITTC-57 METHOD AND GERTLER SERIES DATA CHART
Chuku, Azubuike John*, Ukeh, Michael Edwin and Mkpa, Ante
ABSTRACT
Bare hull resistance estimation is critical in the initial design and subsequent analysis of a vessel?s total resistance. Using the ITTC-57 method and Gertler Series Data Chart, this study therefore, predicts the bare hull resistance of BRODOSPLIT ROPAX Vessel with a dead-weight of 9,000 tonnes, 3560 lanes in meters (LIMs) and 400- passengers carrying capacity. The research considers a case study of the Gulf of Guinea which is the intended region of vessel?s operational route. The region under review has dry season (November-April) and wet season (May-October) with sea surface temperature of 31.50C and 260C respectively. Analysis was done in the Matlab R2015A environment to simulate the bare hull resistance at varying speed in relation to the wetted surface area. Results show that for vessels of similar hydrodynamic particulars, and at average and economic speed range of 24 Knots, the bare hull resistance was estimated to be 2495.6 KN and 2518.3KN for Dry and Wet season respectively. Further analysis for the effective power required shows that an estimated 30,820kW is required by the vessel when running at the design economic speed of 24 knots in dry season and with an effective power increment of about 0.99% in wet season.
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