An Investigation of the Pentamaran Resistance Characteristic with Variance in Hull Combination and Configuration

Yanuar, Yanuar; Ibadurrahman,

doi:10.1016/j.egypro.2018.11.080

Cited by 3 publications

(2 citation statements)

References 11 publications

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“…Eventually, as speed grows friction element (or viscous resistance) exceeds wave-making resistance once more where a planing configuration with a V bottom rather than a round bilge (or U bottom) is highly recommended to minimize friction drag utilizing dynamic lift of water [17]. Notwithstanding that demi-hull separation does not have noticeable influence on the total resistance and correspondingly the friction resistance in the first range (Fr < 0.3), it significantly affects the total resistance when 0.3 < Fr < 0.75 in such a way that the narrower gap imposes more drag force on the vessel clarifying the interaction effect is deeply rooted in the wave-making interference in the latter [18][19][20][21][22][23][24][25][26][27][28].…”

Section: Introductionmentioning

confidence: 97%

A new phenomenon in interference effect on catamaran dynamic response

Honaryar

Ghiasi

Liu

2021

International Journal of Mechanical Sciences

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Interference effect between catamaran demi-hulls has been considered as an adverse fluid-solid interaction; the narrower separation distance between the two hulls, the greater drag force acts upon the catamaran. However, this study is aimed at introducing a novel phenomenon contrasting outcome in semi-planing and planing regimes. As speed and accordingly the Froude number increase the catamaran transits across different modes, free surface profile becomes complicated and so does the interference effect as well as the prediction of catamaran dynamic response. The situation will be even more complex if demi-hull separation narrows where nonlinearity in interference effect is more pronounced. So, free-running tests in six degrees of freedom as well as obtaining fluid flow characteristics using computational fluid dynamics were conducted for a high-speed catamaran vehicle with asymmetric non-prismatic demi-hulls to tackle the problem. The results of catamaran dynamic response reveal that not only is drag reduced substantially up to 15%, but also trim angle diminishes by 30% as hulls separation distance decreases in semi-planing and planing modes. In other words, with increasing speed, and decreasing trim angle by 2.3 o , the current method achieved the goal of consequently reducing the risk of porpoising instability, without the increase of delivered power.

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Section: Introductionmentioning

confidence: 97%

A new phenomenon in interference effect on catamaran dynamic response

Honaryar

Ghiasi

Liu

2021

International Journal of Mechanical Sciences

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“…Design optimization on a float can be seen from the total resistance, that will be 1398 Numerical and Experimental Analysis of Total Hull Resistance on Floating Catamaran Pontoon for N219 Seaplanes based on Biomimetics Design with Clearance Configuration described as follows. The total resistance is composed of viscous resistance related to the Reynolds number and wave resistance, which depends on the Froude number (Yanuar and Ibaddurahman, 2019). In the context of seaplane float, the optimization of catamaran designs is assessed based on the characteristics of the catamaran while in water, namely:…”

Section: Introductionmentioning

confidence: 99%