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

Tsai, Jing‐Fa; Hwang, Jeng-Lih

doi:10.1109/oceans.2004.1405650

Cited by 24 publications

(25 citation statements)

References 6 publications

(2 reference statements)

Supporting

Mentioning

Contrasting

Order By: Relevance

“…The application of even small interceptors (h/L of the order of 0.1%) changed the trim and as a result reduced the resistance considerably (up to 17% at interceptor height of 0.5, 1, 1.5 mm in model scale) [7,8].…”

Section: Literature Reviewmentioning

confidence: 99%

An experimental study of interceptor’s effectiveness on hydrodynamic performance of high-speed planing crafts

Karimi

Seif

Abbaspoor

2013

Polish Maritime Research

View full text Add to dashboard Cite

Trim control mechanisms such as interceptors and trim flaps have been widely used in recent years in highspeed crafts for ride and trim control. In spite of their extensive application, a few studies investigating the impact of interceptors on planing craft performance, have been published. In the present study, the impact of interceptors on planing crafts hydrodynamic quality is investigated through application of an experimental method. Two scaled-down models of high-speed planing mono-hull and catamaran are tested with and without interceptors in calm water at different heights of the interceptors to investigate the effect of interceptors on drag reduction of the models. The first one is a scaled-down model of 11 m planing mono-hull boat and the test was conducted at the towing tank of Sharif

show abstract

Section: Literature Reviewmentioning

confidence: 99%

An experimental study of interceptor’s effectiveness on hydrodynamic performance of high-speed planing crafts

Karimi

Seif

Abbaspoor

2013

Polish Maritime Research

View full text Add to dashboard Cite

show abstract

“…Finally a 3D CFD study was carried out to explore the impact of aspect ratio of the interceptor blade. Tsai et. al.…”

Section: Interceptorsmentioning

confidence: 99%

An experimental study of interceptors for drag reduction on high-performance sailing yachts

Day¹,

Cooper

2011

Ocean Engineering

View full text Add to dashboard Cite

Interceptors have been widely used in recent years in fast ferries and small high-speed leisure and commercial craft for ride and trim control, and steering. In the context of high-performance sailing yachts, they first appeared in 2008 on the yacht Ecover 3 which was dismasted while leading the Vendee Globe Challenge race. However, in spite of their popularity in power craft, few studies have been published investigating the impact of interceptors on vessel performance, and apparently none in the case of sailing yachts. In the current study, interceptors are compared with an aerodynamic device known as a Gurney flap. It is shown that interceptors are generally substantially smaller than Gurney flaps. A comprehensive experiment programme is presented exploring the impact of interceptors on the performance of an Open 60 yacht hull. Results show a marked reduction in calm-water resistance over a wide speed range, with benefits of 10–18% in the speed range between 8 and 20 knots, accompanied by reduced sinkage and trim. The gains observed are much larger than those observed in powercraft, and also substantially greater than those achievable through trim changes by moving ballast longitudinally. The benefits appear to be largely sustained in small waves

show abstract

“…In addition, Wang [9] showed that adding wedges, interceptors, and trim tabs can lead to an extra hydrodynamic force that results in the reduction of both trim and resistance. In a work conducted by Tsai and Hwang [10], combination of wedge and flaps was studied and discussions about appropriate condition for installing these appendages were presented. Moreover, Cumming et al [11] showed that a wedge may also lead to the reduction of cavitation of the propeller in the vessel.…”

Section: Introductionmentioning

confidence: 99%

Experimental Study of the Wedge Effects on the Performance of a Hard-chine Planing Craft in Calm Water

2018

View full text Add to dashboard Cite

In this paper, effects of a wedge on the performance of planing craft in calm water are experimentally investigated. Experiments are carried out on three different cases distinguished by the wedge type. The model, built of fiberglass, is a prismatic planing hull with deadrise angle of 24 degrees. Towing tests are conducted at different Froude numbers ranging from 0.21 to 2.1. The total trim angle, resistance, rise up at the CG as well as stern and bow, keel wetted length, chine wetted length, stagnation angle, and the length of stagnation line are measured. They are used to study the effect of installing a wedge on the performance as well as the effect of height on the hydrodynamic characteristics. Based on the observations made, it is concluded that, when the wedge is applied to the hull, the risk of model exhibiting instability diminishes, while total trim angle largely decreases, keel wetted length is enlarged, wetted surface becomes thinner, CG rise up is lowered, and the resistance is reduced. Moreover, experimental measurements and theoretical 2D+T theory are combined to bring deeper insight about physics of the flow and pressure distribution when a wedge is installed on the bottom of a planing hull.

show abstract

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

Cited by 24 publications

References 6 publications

An experimental study of interceptor’s effectiveness on hydrodynamic performance of high-speed planing crafts

An experimental study of interceptor’s effectiveness on hydrodynamic performance of high-speed planing crafts

An experimental study of interceptors for drag reduction on high-performance sailing yachts

Experimental Study of the Wedge Effects on the Performance of a Hard-chine Planing Craft in Calm Water

Contact Info

Product

Resources

About