Numerical prediction of interference factor in motions and added resistance for Delft catamaran 372

Doğrul, Ali; Kahramanoğlu, Emre; Çakıcı, Ferdi

doi:10.1016/j.oceaneng.2021.108687

Cited by 12 publications

(4 citation statements)

References 27 publications

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“…One of the ways to increase the reliability of the numerical solution in examining the chaotic flow around the five hulls and the interference of the hulls with each other is to establish the fundamental of the study on the benchmark model and its results. For this purpose, the main hulls of the prototype Double-M craft were chosen as the benchmark Delft 372 catamaran hull due to the existence of many numerical and experimental studies on the seakeeping performance [3][4][5][6]. The Delft 372 catamaran hull is designed by the Delft University of Technology as a fast catamaran, detailed information can be found in [1,26].…”

Section: Double-m Craft Design and Test Conditionsmentioning

confidence: 99%

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Full-Scale CFD Analysis of Double-M Craft Seakeeping Performance in Regular Head Waves

Öztürk

Mancini

et al. 2021

JMSE

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This study presents the full-scale resistance and seakeeping performance of an awarded Double-M craft designed as a 15 m next-generation Emergency Response and Rescue Vessel (ERRV). For this purpose, the Double-M craft is designed by comprising the benchmark Delft 372 catamaran with an additional center and two side hulls. First, the resistance and seakeeping analyses of Delft 372 catamaran are simulated on the model scale to verify and compare the numerical setup for Fr = 0.7. Second, the seakeeping performance of the full-scale Double-M craft is examined at Fr = 0.7 in regular head waves (λ/L = 1 to 2.5) for added resistance and 2-DOF motion responses. The turbulent flow is simulated by the unsteady RANS method with the Realizable Two-Layer k-ε scheme. The calm water is represented by the flat VOF (Volume of Fluid) wave, while the incident long waves are represented by the fifth-order Stokes wave. The residual resistance of the Double-M craft is improved by 2.45% compared to that of the Delft 372 catamaran. In the case of maximum improvement (at λ/L = 1.50), the relative added resistance of the Double-M craft is 10.34% lower than the Delft 372 catamaran; moreover, the heave and pitch motion responses were 72.5% and 35.5% less, respectively.

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Section: Double-m Craft Design and Test Conditionsmentioning

confidence: 99%

“…The paper proposed some approaches for stochastic analysis of forces, motions, and slamming loads in irregular and regular waves. In the study of Dogrul et al [6], interference factor through total and added resistance of Delft 372 catamaran hull was examined by the unsteady RANS method at Fr = 0.3 in regular head wave conditions.…”

Section: Introductionmentioning

confidence: 99%

Full-Scale CFD Analysis of Double-M Craft Seakeeping Performance in Regular Head Waves

Öztürk

Mancini

et al. 2021

JMSE

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“…A series of numerical studies have explored the impact of various factors on the hydrodynamic performance of hydrofoil-supported catamarans. Research on catamaran interference factors has shown that the distance between the hulls and the vessel's speed significantly impacts these factors [12], The interaction effects on a catamaran traveling with forward speed in waves have been found to be complex, making seakeeping prediction challenging [13], Zhou [14] and Wang Kapal: Jurnal Ilmu Pengetahuan dan Teknologi Kelautan, 21 (1) (2024):l-9 [15] both found that the installation of a stern flap can reduce resistance and improve sailing attitude, particularly at high speeds and in regular head waves. Kumari [16] further investigated the effects of different hydrofoil configurations on lift and drag coefficients, with a tandem arrangement showing higher lift coefficients.…”

Section: Introductionmentioning

confidence: 99%

CFD Analysis of Interference Factor in Hydrofoil-Supported Catamarans (HYSUCAT)

Firdhaus,

Kiryanto,

Rindo

et al. 2024

Kapal

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Catamaran, with its distinctive dual-hull design, offers unique advantages in maritime applications, including improved stability and space utilization over traditional monohull vessels. However, the interaction between the two hulls generates complex hydrodynamic phenomena, significantly influencing the vessel's overall performance. One critical aspect of this interaction is the interference factor, which affects the hydrodynamic resistance encountered by the vessel. The purpose of this paper is to investigate the changes in hydrodynamic characteristics that occur when hydrofoils are incorporated into typical catamaran hull forms. This is accomplished through the utilization of advanced Computing Fluid Dynamics (CFD) simulations. In this study, a Delft-372 catamaran with a concept design is modified by installing a foil system with a high Reynolds number in order to reduce its overall resistance. The new system is then analyzed in order to determine the impact that it has on interference factors. For the purpose of achieving a comprehensive understanding of hydrodynamic behavior, the simulations are carried out under a variety of operating conditions, which include a variety of speeds. Simulations result indicate that the interference factor consistently increases drag for hydrofoil-supported catamarans to more than double that of monohulls across all speeds, particularly when hydrofoil-induced flow disturbances adversely affect the hull's boundary layer, leading to reduced efficiency.

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“…Lately, Computational Fluid Dynamics (CFD) has imposed itself as a very valuable tool for many numerical studies related to the investigation of the total resistance of a catamaran and the interference phenomenon. [12][13][14][15][16][17][18][19][20] The combination of experimental and computational fluid dynamics currently represents the best practice for the investigation of catamaran hydrodynamics. 21 The influence of a bulbous bow on the total resistance of a yacht was investigated using both towing tank tests and numerical simulations.…”

Section: Introductionmentioning

confidence: 99%

Numerical investigation of interference effects for the Delft 372 catamaran

Farkas,

Degiuli,

Tomljenović

et al. 2023

Proceedings of the Institution of Mechanical Engineers, Part M:

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Due to interference effects, the resistance of a catamaran is not the same as the double resistance of the monohull. If demihulls are close enough to each other, the wave fields generated by each demihull usually significantly interfere causing either advantageous or disadvantageous effects. In this paper, the numerical investigation of interference effects for the Delft 372 catamaran is performed. The verification and validation studies are performed demonstrating the potential of the proposed numerical model for the analysis of interference effects. The investigation of the effect of Froude number and demihull separation on the total resistance of a catamaran, trim angle, and sinkage is conducted. The interference effects are quantified through the interference factor, which is defined based on the total resistance of a catamaran and double the total resistance of the monohull. Finally, the flow field characteristics, wave patterns, and pressure distributions are analysed using Computational Fluid Dynamics.

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Numerical prediction of interference factor in motions and added resistance for Delft catamaran 372

Cited by 12 publications

References 27 publications

Full-Scale CFD Analysis of Double-M Craft Seakeeping Performance in Regular Head Waves

Full-Scale CFD Analysis of Double-M Craft Seakeeping Performance in Regular Head Waves

CFD Analysis of Interference Factor in Hydrofoil-Supported Catamarans (HYSUCAT)

Numerical investigation of interference effects for the Delft 372 catamaran

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