Numerical evaluation on the effects of interceptor layout and blade heights for a prismatic planing hull

Şahin, Ömer Sinan; Kahramanoğlu, Emre; Çakıcı, Ferdi

doi:10.1016/j.apor.2022.103302

Cited by 13 publications

(11 citation statements)

References 28 publications

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“…It is noted that the difference only comes from the periods that the velocity of the vessel is kept to a constant velocity. It is interesting to note that the defined velocity range is taken between FrB=1.50 and FrB=2.50 which are typical speed ranges for interceptor usage [9]. Figure 8 is given for the standard and optimum trim angles of the subjected planing vessel by using the methodology presented in Sancak and Cakici [27].…”

Section: Simulation Resultsmentioning

confidence: 99%

“…Figure 2 shows the 2D and 3D views of the hull form which was re-scaled from the original form produced by Begovic and Bertorello [24]. Please note that the selected planing hull form can be assumed as a benchmark because several investigations have been carried out by using this form [9]. Fig.…”

Section: The Coordinate System and The Hull With Interceptormentioning

confidence: 99%

“…Fig. 5 The logic for the transition from the flap to the interceptor [9] As known well, Savitsky and Brown [26] )) The interceptor blade height (h) can be calculated as defined in Equation ( 14).…”

Section: Forces Induced By Interceptormentioning

confidence: 99%

“…However, the studies about these mechanisms showed that the change of the appendage configuration such as blade height, angle of attack, etc. can be more efficient not only in waves but also in calm water [8], [9], [10], [11]. In other words, introducing well-designed automatic control that drives the actuators actively is more useful compared to passive ones.…”

Section: Introductionmentioning

confidence: 99%

“…Fig 9. The LQR controlled trim vs. optimum trim (left) and blade heights with respect to time for VP1…”

mentioning

confidence: 99%

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Nowadays, interceptors are often used to decrease total resistance and enhance comfort by reducing dynamic trim for high-speed planing vessels. They can be controlled manually as well as automatically by using a suitable closed-loop control system. Thus, in the present study, an automatically controllable system is presented to minimize the total resistance by reducing the dynamic trim in calm water. To reach this aim, a mathematical model which can represent the 2 degree of freedom vertical motion of a prismatic planing vessel is presented. The coefficients used in the model are calculated by using the Savitsky method. The standard dynamic trim angle and the optimum ones in terms of resistance are calculated by using the same method. For control action, a linear full state feedback control strategy (linear quadratic regulator) is applied, and instantaneous blade heights are found considering the change in forward speed. Therefore, the control-oriented model is able to change the blade height to reach the optimum trim angle in terms of the total resistance of the vessel for different forward speeds and speed profiles. The results show that the designed linear quadratic regulator control strategy is successful for reference trim tracking problems.

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Section: Simulation Resultsmentioning

confidence: 99%

Section: The Coordinate System and The Hull With Interceptormentioning

confidence: 99%