Model tests on resistance and seakeeping performance of wave-piercing high-speed vessel with spray rails

Seo, Jeonghwa; Choi, Hak-Kyu; Jeong, Uh-Cheul; Lee, Dong Kun; Rhee, Shin Hyung; Jung, Chul-Min; Yoo, Jaehoon

doi:10.1016/j.ijnaoe.2016.05.010

Cited by 34 publications

(11 citation statements)

References 6 publications

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“…as proposed by Begovic and Bertorello [27]. It would be interesting to find C R and C T of each case and effects of the wedge and its height on these coefficients.…”

Section: Comparison Of Different Parameters For Different Modelsmentioning

confidence: 83%

“…Accordingly, during the last decade, wide ranges of experimental studies have been devoted to study different characteristics of the planing hulls. Performance of these hulls [22][23][24][25][26][27], their seakeeping [28,29], roll motion [30], and even steady yawed [31,32] condition have been studied. The satisfactory, promising, and useful findings of these studies signal that experimental works can be considered as a very reliable alternative methodology for investigating the planing hull characteristics.…”

Section: Introductionmentioning

confidence: 99%

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

2018

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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.

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“…as proposed by Begovic and Bertorello [27]. It would be interesting to find C R and C T of each case and effects of the wedge and its height on these coefficients.…”

Section: Comparison Of Different Parameters For Different Modelsmentioning

confidence: 83%

Section: Introductionmentioning

confidence: 99%

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

2018

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“…It is emphasized that the form factor idea is so complicated to be applied in high-speed crafts. Therefore, the ITTC 1957 method is proposed for extrapolation of resistance model test for high-speed craft [9].…”

Section: Introductionmentioning

confidence: 99%

On the scale effects of resistance model tests of high-speed monohulls

Kazerooni

Seif

2019

J Braz. Soc. Mech. Sci. Eng.

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Scaled model test in towing tank is a common method to predict the ship resistance in calm water. The scale effects are dominant in these tests because the Reynolds and Froude numbers of the model and full-scale ship cannot be equal. There is a sufficient amount of knowledge about the displacement hulls which have limited speed ranges in most cases. However, scarcity of published data on high-speed crafts is noticed. The influence of the model length on ship resistance varies in different speeds, so it should be studied in more detail. The extrapolation method of model ship resistance to full scale is studied in this paper for high-speed monohulls. Resistance model tests of semi-displacement and planing hull are executed for two different sizes. The frictional resistance coefficient is calculated by ITTC57 correlation line, and the residual resistance coefficient is derived for each case. According to the results, it was concluded that the major part of ship resistance is dedicated to frictional resistance in low speeds for length Froude numbers below 0.3 or above 0.9. In moderate speeds, which are of semi-displacement hulls' interest, small portion of hull resistance is dedicated to frictional resistance and model size has small influence on the residual resistance coefficient.

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“…Today, the model and obtained results of Clement (1963) is used for calibrating of newly constructed towing tanks. In a recent study done by Seo et al (2016), the resistance and seakeeping performance of a high-speed monohull vessel with slender wave-piercing bow, round bilge, and small deadrise angle were investigated through a series of model tests with and without spray-rails in a towing tank. They reported that the spray rails did not have any negative effects on the resistance performance of the hull, while they effectively stabilized the vessel in calm water and waves.…”

Section: Introductionmentioning

confidence: 99%

“…The C μ is a constant equals to 0.09. The k and ε are computed locally from the transport equations of (4) and(5) (Ferziger et al (2002)).…”

mentioning

confidence: 99%

Effects of Loading Conditions on Hydrodynamics of a Hard-Chine Planing Vessel Using CFD and a Dynamic Model

Kazemi

Salari

2017

ijmt

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Planing vessels usually have low ratios of resistance to weight, so they can move fast on sea surface than the displacement or semi-displacement ships. Access to higher speeds is one of the attractions for designers and users. To achieve higher speeds, reducing the hydrodynamic resistance is a necessity for this class of vessels. In this study, a 3D finite volume approach is used to analyze the hydrodynamics of the Cougar high-speed vessel, a hard chine planing hull. In addition to use of the URANS equations for momentum, SIMPLE algorithm for coupling of the pressure and velocity field and the k- for turbulence modeling, the fluid phases of air/water and the free surface are modeled using the volume of fraction (VOF) scheme. Moreover, in the simulations, instead fixing the freedom of the model regards to the computational domain, the vessel motions are also considered to have two degrees of freedom, 2-DOF, using the newly developed moving mesh technique of Overset. The grid independency study shows a good consistency between the numerical results and experiments for the vessel resistance, trim angles and the heave. Main emphasis of this paper is on study of the effects of different loading conditions, the vessel weight and the longitudinal center of gravity, on the hydrodynamic characteristics such as resistance, trim angle and the vessel sinkage. All of the numerical simulations are done using the commercial software of Star CCM+

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Model tests on resistance and seakeeping performance of wave-piercing high-speed vessel with spray rails

Cited by 34 publications

References 6 publications

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

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

On the scale effects of resistance model tests of high-speed monohulls

Effects of Loading Conditions on Hydrodynamics of a Hard-Chine Planing Vessel Using CFD and a Dynamic Model

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