Study on the compound effects of interceptor with stern flap for two fast monohulls

Author

Tsai, J.F. ; Hwang, J.L.

Author_Institution

Dept. of Eng. Sci. & Ocean Eng., Nat. Taiwan Univ., Taipei, Taiwan

Volume

2

fYear

2004

fDate

9-12 Nov. 2004

Firstpage

1023

Abstract

The effect of trim mechanisms (including stern flap, interceptor and integrated interceptor with stern flap) on resistance reduction were examined in this study. Two planning crafts were used for the resistance test. The first one is a 20-meter patrol boat and the test was conducted at the towing tank of National Taiwan University(NTU), Taiwan, ROC. The second one is 29.5-meter patrol boat tested at HSVA towing tank, The Hamburg Ship Model Basin, Germany. The results show that a well-designed trim mechanism can reduce the running trim and the resistance of the planning craft. It also show that the trim mechanisms have a best resistance reduction effect at the volume Froude number between 2.0 and 2.5. The drag reduction of integrated interceptor with stern flap is better than that of interceptor alone and stern flap alone.

Keywords

drag reduction; marine vehicles; 20 m; 29.5 m; Germany; HSVA; Hamburg Ship Model Basin; NTU; National Taiwan University; ROC; Taiwan; craft; drag reduction; interceptor compound effect; monohulls; patrol boat; resistance reduction; resistance test; running trim; stern flap; towing tank; trim mechanisms; volume Froude number; Boats; Drag; Electrical resistance measurement; Fuels; Geometry; Marine vehicles; Oceans; Planing; Sea measurements; Testing;

fLanguage

English

Publisher

ieee

Conference_Titel

OCEANS '04. MTTS/IEEE TECHNO-OCEAN '04

Print_ISBN

0-7803-8669-8

Type

conf

DOI

10.1109/OCEANS.2004.1405650

Filename

1405650