Experiments and CFD of a high-speed deep-V planing hull––Part I: Calm water

Judge, Carolyn Q.; Mousaviraad, Maysam; Stern, Frederick; Lee, Evan; Fullerton, Anne M.; Geiser, Jayson; Schleicher, Christine; Merrill, Craig F.; Weil, Charles; Morin, Jason; Jiang, Minyee; Ikeda, Christine

doi:10.1016/j.apor.2020.102060

Cited by 28 publications

(12 citation statements)

References 13 publications

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“…Research on planning hull continues to be carried out until now both through experiments and simulations with advances in seakeeping performance [6,7]. Experimental methods have been widely researched carried out from the beginning development of planing hull models, but due to the high cost of experiments [8], this method is decreased only for data validation.…”

Section: Introductionmentioning

confidence: 99%

Lift-to-Drag Ratio of the Application of Hydrofoil With Variation Mounted Position on High-Speed Patrol Vessel

Budiyanto

Prawira

Dwiputra

2021

CFDL

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The hydrofoil is one of the hydrodynamic support technologies for marine vehicles that provide a high performance and are feasible to operate. The mounting position of hydrofoils on the hull is one of the keys to improving the hydrodynamic performance, where the existing academic literature to find the optimum position of hydrodynamic is still deficient. The objective of this study is to compare the mounting locations of hydrofoil in the horizontal axis in a high-speed patrol vessel. The comparison result is based on the computational fluid dynamics where the basic model was validated using experimental data. Three mounting location cases of hydrofoils were performed i.e. middle section, stern section, and behind the stern. The result shows that the optimal hydrofoil mounting position is after the transom. In this position, the value of the lift-to-drag ratio is higher by an average of 10% - 29% compared to other positions depending on the speed of the ship.

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Section: Introductionmentioning

confidence: 99%

Lift-to-Drag Ratio of the Application of Hydrofoil With Variation Mounted Position on High-Speed Patrol Vessel

Budiyanto

Prawira

Dwiputra

2021

CFDL

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“…(2019) Najafi et al [32] Using experimental methods, they examined the effect of geometric parameters on a single-step vessel. (2019) Judgea et al [33] Experimental and numerical studies were conducted on a single-hulled high-speed vessel. (2020) Niazmand et al [34] Experimental and the 2D+T mathematical modeling method were presented for a two-step model.…”

Section: Stepped Hullsmentioning

confidence: 99%

Experimental study of hydrodynamic performance of a Monohull Planing vessel equipped by combined transverse step and transom wedge in comparison with a model of no appendage

et al. 2020

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One of the most well-known strategies to eliminate or reduce the longitudinal instabilities in planing hull, is to reduce the trim of the craft. In the current study, porpoising is controlled through creating a transverse step, and the combination of adding a wedge to the stern and transverse step in the vessel. Usually, performance of stepped boats is not suitable in preplaning regime. However, through the proposed method, stepped model performance can be improved prior to the planing regime. The investigated craft is a 2.56 m long monohull high speed model with speed range of 1,3,5,7 and 9 m/s. The obtained results indicate that best performance is acquired by the step and wedge model at the beginning of the planing regime. From 3 to 7 m/s, drag of stepped and wedged models has the lowest value and above 7 m/s and at 9 m/s, the stepped model has the lowest resistance. Among the investigated methods, using combined step and wedge indicates largest reduction in trim angle (At speeds of 3 to 9 m/s). It can therefore be concluded that model equipped by combination of wedge and step improves the poor performance of the stepped models prior to the planing regime.

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“…Tey ensured that the moving mesh has high priority for the numerical study of planing hulls. Alongside the meshing profciency, Judge et al [20] indicated how accurate geometric data and hydrostatic calculations could be efective in obtaining a reliable simulation of planing hulls. Recently, the meshless methods have also attracted the great attention of many researchers in maritime engineering.…”

Section: Introductionmentioning

confidence: 99%

Numerical Study of the Effect of Angle and Location of the First and Second Steps on the Performance of Planing Hull and Their Optimization Using the Taguchi Statistical Method

Ghadimi

Sajedi

Sheikholeslami

et al. 2023

Mathematical Problems in Engineering

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Providing steps at the bottom of a high-speed craft could decrease the resistance and enhance the longitudinal stability by dividing a single pressure hump into several ones and extending the hydrodynamic pressure towards aft of the vessel. In the present paper, the effects of the fore and aft steps’ locations and angles on double-stepped hulls are investigated systematically via a numerical approach. The parent model investigated in this study is a model of a high-speed recreational craft called Cougar, with a 1 : 5 scale. The three-dimensional analysis of the model is conducted via the finite volume method, and the free surface is tracked using the volume of the fluid technique. The computational domain is discretized by the overset technique, and the calculations are validated via experimental data. Overall, 27 numerical tests designed by the Taguchi experiment design method are simulated, and the resistance, trim, and rise-up values are calculated at 8 to 10 m/s speeds. The findings support the notion that the resistance increases by increasing the distance between the fore step and vessel stern. In addition, increasing the distance between the aft step and vessel stern and the increase of the angle of the fore step leads to reducing the vessel resistance. However, the results showed that finding a sensible relationship between the angle of the aft step and resistance requires more investigation. The findings revealed that the interactional effects between the angles of the aft and fore steps are the most considerable among all studied interactional effects. Among the all studied configurations, the lowest resistance was experienced by the model with an aft step at 25% of the vessel’s length to the stern, having an angle of 150°, and a fore step at 40% of the vessel’s length to the stern, having an angle of 180°.

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Experiments and CFD of a high-speed deep-V planing hull––Part I: Calm water

Cited by 28 publications

References 13 publications

Lift-to-Drag Ratio of the Application of Hydrofoil With Variation Mounted Position on High-Speed Patrol Vessel

Lift-to-Drag Ratio of the Application of Hydrofoil With Variation Mounted Position on High-Speed Patrol Vessel

Experimental study of hydrodynamic performance of a Monohull Planing vessel equipped by combined transverse step and transom wedge in comparison with a model of no appendage

Numerical Study of the Effect of Angle and Location of the First and Second Steps on the Performance of Planing Hull and Their Optimization Using the Taguchi Statistical Method

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