Hydrodynamic performance of planing craft with interceptor-flap hybrid combination

Jangam, Suneela; Krishnankutty, P.; Subramanian, V. Anantha

doi:10.1007/s40722-021-00211-0

Cited by 15 publications

(8 citation statements)

References 18 publications

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“…An interesting effect occurs in studies related to planing watercrafts and the inclusion of appendages, which substantially improves the dynamic trim of the watercraft. This can be seen in the work by [28], where the inclusion of an interceptor decreased the trim and reduced the total resistance. This would improve the current condition of the RRC+700 hull.…”

Section: Resultsmentioning

confidence: 84%

“…The meshing focused on solving the problems that arose from the motion of the rigid body during the simulation. Considering this aspect and previous studies, such as Niazmand et al ( 2023) [27] and Suneela et al (2022) [28], an overset region was used for the area near the hull. An automatic meshing domain was used for the fluid area farther from the hull (See Figure 7).…”

Section: Meshing Approachmentioning

confidence: 99%

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Effect of Speed and Hull Length on the Hydrodynamic Performance of a Semi-Planing Hull of a Shallow-Draft Watercraft

Leal-Ruiz,

Camargo-Díaz,

Paipa-Sanabria

et al. 2023

JMSE

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Hydrodynamic performance is an essential factor in the design of a watercraft, and the navigation scenario determines the complexity of its operation. This study aims to identify the effect of speed and length on the hydrodynamic behavior of a semi-planing watercraft in shallow waters. A computational fluid dynamics tool was employed to predict the trim, heave, and resistance parameters of two different hulls: a base hull and a craft with an increased hull length. The two hulls had similar hydrodynamic characteristics. The effects of speed and hull length on these predicted parameters obtained for the two hulls were compared. The results showed a low resistance uncertainty and a reduction in dynamic trim for longer hull lengths. These findings highlight the importance of considering balance and dynamic trim in designing shallow-draft watercrafts to ensure an optimal performance in specific conditions, such as rivers with depth restrictions.

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Section: Resultsmentioning

confidence: 84%

Section: Meshing Approachmentioning

confidence: 99%

Effect of Speed and Hull Length on the Hydrodynamic Performance of a Semi-Planing Hull of a Shallow-Draft Watercraft

Leal-Ruiz,

Camargo-Díaz,

Paipa-Sanabria

et al. 2023

JMSE

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“…At the interface between the phases of water and air, the Volume of Fluid (VOF) approach was used to simulate changes in the free surface. [25]. The time step (Δt) used in the unsteady simulation should be small enough to complete the motion on a free surface.…”

Section: Numerical Approachmentioning

confidence: 99%

“…Figure 6 shows y+ values on ships, where the average y+ values are 50-100 at Fr 1.45. At the interface between the phases of water and air, the Volume of Fluid (VOF) approach was used to simulate changes in the free surface [25]. However, it should be noted that the Y+ value needs to be studied to capture the turbulence phenomenon well.…”

Section: Numerical Approachmentioning

confidence: 99%

Advancing Interceptor Design: Analyzing the Impact of Extended Stern Form on Deep-V Planing Hulls

Samuel Samuel,

Rizal Kurnia Praja,

Deddy Chrismianto

et al. 2024

CFDL

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The deep-v planing hull is designed to operate at high speeds because most of the hull’s weight is supported by the hydrodynamic lift acting on the hull base. Planing hull form characteristics such as deadrise angle, chines, and extended stern significantly affect the ship’s hydrodynamic performance. The addition of the interceptor is an innovation to reduce the total resistance of the ship by controlling the trim angle. However, the form of the ship’s stern is not always the same; thus, it needs to be studied based on the form of the ship’s stern. The extended stern form refers to modifying the hull geometry at the rear, particularly the stern extension beyond its conventional length. This research aimed to analyze the hydrodynamic performance of the interceptor at the extended stern angle. Furthermore, Computational Fluid Dynamics (CFD) simulations were performed to analyze the effect of the extended stern form. A numerical model of the deep-V planing hull with variations of the stern extension was developed, and the flow behavior around the hull was analyzed using CFD techniques. Simulations were conducted under various operating conditions, including different speeds and interceptor strokes. The results indicated that the extended stern's different forms could affect the ship's resistance, trim, and heave. The reduction in resistance was seen at moderate speeds, thereby reducing steep trim angles. The greater the extended stern angle, the more significant the reduction in ship resistance at Fr 0.58 by 26%. Likewise, the combination of interceptor and extended stern experienced a decrease in resistance in the semi-displacement phase with a percentage of 33% resistance, 66% trim, and 47% heave. The interceptor stroke (d) depended on the boundary layer (h). The extended stern with angles of 10°, 20°, and 30° were found to have d/h ratios of 0.38, 0.37, and 0.34. However, it should be noted that extending the stern without interceptors and with interceptors at high speeds could result in a dangerous increase in resistance on high-speed vessel.

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“…Several improvements to reduce ship resistance are to change the shape or modify the hull (5)(6)(7). The ship resistance can be decreased by reducing wave or friction resistance using stern flaps (8,9), hydrofoil (10) and also interceptor-flap hybrid combination (11,12). Other devices used to improve ship performance are spray deflectors or spray strips.…”

Section: Introductionmentioning

confidence: 99%

Numerical Investigation of Interceptor Bulb to Improve Trim Control

Yulianti,

Samuel,

Manik

et al. 2024

IJE

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This study addresses interceptor devices to improve the hydrodynamic characteristic of autonomous unmanned surface vehicle (USV). The bulb and rectangular interceptors had molded on a planning hull. This research aims to mitigate drag impact on rectangular interceptors at high speeds. According to this study, a bulb interceptor had a better impact than a rectangular interceptor. This research is based on the finite volume method (FVM) with dynamic fluid-body interaction (DFBI), which captured the ship's dynamic trim and sinkage. The simulation used an overset mesh technique with two domains as a donor-acceptor cell. Furthermore, numerical calculations using the Reynolds-Averaged Navier-Stokes equation and the k-turbulence model predict the turbulent flow. Grid independence studies and international towing tank conference (ITTC) recommendations have been applied to ensure simulation accuracy. This study reported that the bulb interceptor had effectiveness between 9%-25% compared to the rectangular interceptor at high speed. This research showed that the bulb interceptor had better effectiveness than the rectangular interceptor.

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Hydrodynamic performance of planing craft with interceptor-flap hybrid combination

Cited by 15 publications

References 18 publications

Effect of Speed and Hull Length on the Hydrodynamic Performance of a Semi-Planing Hull of a Shallow-Draft Watercraft

Effect of Speed and Hull Length on the Hydrodynamic Performance of a Semi-Planing Hull of a Shallow-Draft Watercraft

Advancing Interceptor Design: Analyzing the Impact of Extended Stern Form on Deep-V Planing Hulls

Numerical Investigation of Interceptor Bulb to Improve Trim Control

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