Twenty-Fourth Symposium on Naval Hydrodynamics (2003) / Chapter Skim
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Validation of Numerical Method for Predicting Hydrodynamic Characteristics of a High-Speed Ship
Validation of Numerical Method for Predicting Hydrodynamic Characteristics of a High-Speed Ship
Pages 595-608
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From page 595... ...
Theses comparison include ship running attitudes, wetted surface at running condition, total resistance coefficients and surface pressure distributions. Also the code is validated for the prediction of the effects of hull shape on the hydrodynamic characteristics of the ship and the results are compared with the available experimental data.
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From page 596... ...
The descriptions of experimental data used for the validation study will be followed. Then, comparisons of computed results and experimental data are presented.
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From page 597... ...
Experimental data In the present study, experimental data for two selected hull forms of high-speed ships are used for the code validation. For the validation of computed running attitudes and resistance coefficients, experimental data for NPL round bilge series hull forms (Marwood and Bailey 1969, Bailey, 1974)
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From page 598... ...
Also seen in these figures is that the increased positive pressure region exist at higher Froude numbers. The comparison of computed surface pressure distributions on the keel line for Hull B with the experimental data are shown in Figs.
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From page 599... ...
The computed wetted surface areas correlate fairly well with the experimental data. Resistance coefficient To make a direct comparison of computed resistance coefficients with the measured ones, total resistance coefficient CTM]
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From page 600... ...
Between the computed results and experimental data, comparisons are made of surface pressure distributions, running attitudes and resistance coefficients. The computed surface pressure distributions agree well with the experimental data.
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From page 601... ...
171-183. Lin, C.W., and Percival, S., "Free Surface Viscous Flow Computation Around A Transom Stern Ship By Chimera Overlapping Scheme," Proceedings of the Twenty-Third Symposium on Naval Hydrodynamics, Rouen, 2000.
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From page 602... ...
: ~ 3 4 3g~ 6 7 8 9 F P S.s. Figure 6: Computed surface pressure distributions for Hull c.
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From page 603... ...
at PS. 0¢0.0 —0.2 ''0.4 0.6 0.8 Fn Figure 14: Effect of Fn on surface pressure for Hull B
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From page 604... ...
( WD-VIII ) i 111111111~1 111111111~1 ~11111111111 T 1 1 T I I I I I T N~ 1 1 T I r 1 1 I T NPL-150A _401 1 1 1 1 · I I I I I ~ 1 1 1 1 1 1 1 1 1 1 1 1~1 1 1 1 1 1 1 1 1 11 ~ 0.0 0.2 0.4 0.6 0.8 1.0 1.2 Fn Figure 18: Comparison of running attitudes for NPL 1 SOA.
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From page 605... ...
( W~VIII ) |' 0.4 0.6 0.8 1.0 1.2 Fn Figure 21: Comparison ofwetted surface area for NPL lOOA.
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From page 607... ...
5.0 5.5 6.0 6.5 7.0 7.5 L/v1/3 Figure 29: Effect of L/V l/3 on total resistance coefficient, Fn=0.6.
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From page 608... ...
trends, i.e. the slope of the experimental data, and the quantitative agreements with the experimental data seem to be poor.
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