Hydrodynamics of the interceptor on a 2-D flat plate by CFD and experiments

Mansoori, M.; Fernandes, Antonio Carlos

doi:10.1016/s1001-6058(15)60555-8

Cited by 33 publications

(12 citation statements)

References 6 publications

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“…In this case, the interceptor height d and boundary layer thicknessd x ð Þsatisfy: d=d x ð Þ < 0:6. 33 According to the definition of d x ð Þ, it decreases with the Froude number increases, as shown in Figure 13. When M s ¼ M t , the trim is controlled well, and this condition appears for interceptor when d=d x ð Þ � 0:6.…”

Section: Effect Of the Interceptor Hydrofoil And Their Combinationmentioning

confidence: 96%

Investigation on trim control of semi-planing amphibious cargo truck using experimental and numerical approaches

Sun

Zou

2021

Proceedings of the Institution of Mechanical Engineers, Part C:

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Speed on water is a key indicator of amphibious vehicles. However, due to the inherent non-streamlined configuration, when reaching a certain velocity, the resistance acting on the vehicle hull is so large and the maximum speed on water is hard to be further enhanced. Moreover, the trim gets so larger that leads the stern submerged into water when speed up. In order to solve this problem of a semi-planing amphibious cargo truck, this paper proposed a method by installing interceptors, hydrofoils, and combination of them on the stern. Experimental tests and numerical studies were performed respectively, and the numerical results were in good agreement with experiment. In what continues, the effect of interceptors, hydrofoils, and combination of them on trim and resistance was investigated. The results showed that the interceptor had a better effect than hydrofoil when height is not so big, but the effect got more and more powerful with interceptor height increasing, finally lead to an excessive trim control. Combination of interceptor with hydrofoil in suitable size were beneficial to trim control and resistance reduction.

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Section: Effect Of the Interceptor Hydrofoil And Their Combinationmentioning

confidence: 96%

Investigation on trim control of semi-planing amphibious cargo truck using experimental and numerical approaches

Sun

Zou

2021

Proceedings of the Institution of Mechanical Engineers, Part C:

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“…The effect of appendages on the stability of the planning hulls has been pursued by other researchers like Steen et al [42]. Mansouri and Fernandes [43] studied effects of an interceptor on the performance of planing hulls in two-dimensions through numerical approach. They subsequently extended their studies to a three-dimensional case [44].…”

Section: Wedge Mounted 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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“…In this realm, good accuracy of finite element method (FEM) in simulation of the steady performance in calm water can be seen in the work of Ackerman et al 18 On the other hand, finite volume method (FVM) has been used by different researchers to predict the steady performance and motion in waves. [19][20][21][22][23][24][25][26] Some comments about the accuracy of these methods can be found in the works of Brizzorola and Sera. 27 In addition to FVM and FEM, boundary element method (BEM) has shown good and reliable accuracy.…”

Section: Previous Workmentioning

confidence: 99%

Numerical investigation of hydrodynamic forces acting on the non-stepped and double-stepped planing hulls during yawed steady motion

Ghadimi

Panahi

2018

Proceedings of the Institution of Mechanical Engineers, Part M:

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This article focuses on the steady motion of yawed planing hulls with emphasis on the effects of adding steps to the bottom of these vessels on the hydrodynamic forces and moments acting on the boat. To analyze the problem, the Ansys-CFX software is used and three different planing hulls are investigated in steady yawed condition. The main targeted results include hydrodynamic forces and moments acting on the boat at different yaw angles and beam Froude numbers which provide important insights regarding the effects of loading and adding step on these forces and moments. The numerically predicted sway forces are compared against experimental data, suggesting that the current numerical model predicts sway and surge forces with reasonable accuracy. Moreover, it is observed that surge force coefficient of the investigated prismatic planing hull with light loading condition does not change significantly when the hull is relocated in a yaw angle, while it is remarkably affected when the boat is heavy. Furthermore, it is observed that this prismatic planing hull has smaller rolling moment in a steady yawed motion, when it moves at larger beam Froude number. Meanwhile, the computed yawing moments of this hull indicate that an increase in speed does not change this moment notably, while an increase in its weight yields larger yawing moment. Comparison of the results of stepped and non-stepped planing hulls indicates that surge force coefficient of the stepped hull is larger, while its sway force and rolling moment are smaller. This is mainly caused by the shape of the interrupted wetted surface and larger number of maximum pressure area in the stepped planing hull. Finally, it is concluded that there is no significant difference between the yawing moment of the investigated stepped and non-stepped planing hulls.

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Hydrodynamics of the interceptor on a 2-D flat plate by CFD and experiments

Cited by 33 publications

References 6 publications

Investigation on trim control of semi-planing amphibious cargo truck using experimental and numerical approaches

Investigation on trim control of semi-planing amphibious cargo truck using experimental and numerical approaches

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 investigation of hydrodynamic forces acting on the non-stepped and double-stepped planing hulls during yawed steady motion

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