Numerical simulation of 2D hydrodynamic impact of wedge and ship section at variable velocity

Rahaman, Md. Mashiur; Akimoto, Hiromichi; Ali, Md. Ashim

doi:10.3329/jname.v10i1.14383

Cited by 3 publications

(2 citation statements)

References 6 publications

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“…The submerged behavior of high-speed craft is directly related to the pressure distribution on the bottom of the craft and thereby the pressure center at the bottom. Finding the pressure distribution on the planing hulls is very influential on their performance and has been studied separately in various research works through analytical, 2–4 numerical, 5–17 and experimental 18,19 approach, or simultaneous use of them. 20–22…”

Section: Introductionmentioning

confidence: 99%

Experimental and numerical analyses of wedge effects on the rooster tail and porpoising phenomenon of a high-speed planing craft in calm water

Sajedi

Ghadimi

Sheikholeslami

et al. 2019

Proceedings of the Institution of Mechanical Engineers, Part C:

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This paper presents experimental and numerical investigation of stability and rooster tail of a mono-hull high-speed planing craft with a constant deadrise angle. Initially, a one-fifth scale model was tested in a towing tank, which showed porpoising phenomenon at 8 m/s (equal to the speed of sailing). Subsequently, two wedges of 5 and 10 mm heights, based on the boundary layer calculations, were mounted on the aft section of the planing hull. These wedges were shown to increase the lift at the aft section. These experiments were carried out at different speeds up to 10 m/s in calm water. The experimental results indicated that the installed wedges reduced the trim, drag, and the elapsed time for reaching the hump peak, and also eliminated the porpoising condition. All these test cases were also numerically simulated using Star CCM+ software. The free surface was modeled using the volume of fluid scheme in three-dimensional space. The examined planing craft had two degrees of freedom, and overset mesh technique was used for space discretization. The obtained numerical results were compared with experimental data and good agreement was displayed in the presented comparisons. Ultimately, the effect of the wedge on the rooster tail behind the planing craft was studied. The results of this investigation showed that by decreasing the trim at a constant speed, the height of the generated wake profile (rooster tail) behind the craft decreases, albeit its length increases.

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Section: Introductionmentioning

confidence: 99%

Experimental and numerical analyses of wedge effects on the rooster tail and porpoising phenomenon of a high-speed planing craft in calm water

Sajedi

Ghadimi

Sheikholeslami

et al. 2019

Proceedings of the Institution of Mechanical Engineers, Part C:

View full text Add to dashboard Cite

show abstract

“…More realistic solutions may be acquired by advanced numerical methods such as volume of fluid (VOF). Recently, some researchers have applied VOF to solve nonlinear free surface problems , , Hargreaves et al (2007), Ying et al (2009), Wang andWang (2010) and Rahaman et al (2013).…”

Section: Introductionmentioning

confidence: 99%