Effect of the Longitudinal Location of a Pair of Outer Hulls on Resistance for the 4300 Ton O'Neill Hullform Concept (OHF) Ship Represented by DTNSRDC Model 5355-1.
Final research and development rept.,
DAVID W TAYLOR NAVAL SHIP RESEARCH AND DEVELOPMENT CENTER BETHESDA MD SHIP PERFORMANCE DEPT
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Resistance experiments were conducted with a model representing the ONeill Hullform Concept OHF. The purposes of the experiments were to investigate the effect on resistance caused by the addition of a pair of strut-like outer hulls to DTNSRDC model 5355 and to determine the sensitivity of the outer hull longitudinal location on resistance. This information will be used to assess the merits of the OHF concept. The residuary resistance coefficient based on model data is lower over most of the speed range than the analytical prediction, but the trends are similar. The experimental results show that the outer hulls produce about fifty percent of the total resistance of the OHF. The total resistance of the OHF, however, compares favorably with that of SWATH III, a typical conventional SWATH hullform of similar size. Thus, the concept shows merit for further investigation. Resistance was lowest with the struts located at the forward position at several speeds below 22 knots, and at all speeds above 25 knots. Author
- Marine Engineering
- Fluid Mechanics