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Unconventional Marine Vehicles
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Unconventional Marine Vehicles

A special issue of Journal of Marine Science and Engineering (ISSN 2077-1312). This special issue belongs to the section "Ocean Engineering".

Deadline for manuscript submissions: closed (15 April 2021) | Viewed by 19089

Special Issue Editor

Dr. Simone Mancini

E-Mail Website
Guest Editor
Force Technology, Department of Hydro and Aerodynamics, Force Technology, 2800 Kgs. Lyngby, Denmark
Interests: computational fluid dynamics (CFD) simulations; marine hydrodynamics; ship design; ship seakeeping and maneuverability; verification and validation process
Special Issues, Collections and Topics in MDPI journals

Special Issue Information

Dear Colleagues,

Unconventional hulls, e.g., planing and stepped hulls, catamarans and trimarans (and multihulls), small waterplane area twin hulls (SWATHs), slice SWATHs, air cushion vehicles (ACV), and surface effect ships (SES), wing-in-ground (WIG), and hydrofoils, are of great interest in the marine industries and in the researcher community, as these unconventional ships could be the best-fit solution for specific issues that conventional hulls fail to ensure, in particular, the capability to reach high speeds, reduce hull motion, or increase payloads without a significant increase of volume. However, unconventional hulls are not so easy to investigate in terms of experimental analysis, due to difficulties in recreating and evaluating the complex phenomena underpinning an unconventional hull’s physical behaviors. Today, the increase of computational resources and computational tools, such as CFD methods (RANS, LES, SPH, etc.), gives researchers and designers great support in the investigation and evaluation of the performances (resistance, seakeeping, and maneuverability attitude) of specific unconventional hull solutions, also in the early design stage. The aim of this Special Issue is to collect state-of-the-art contributions about the investigation and analysis of performances (resistance, running attitudes, seakeeping, and maneuvering capabilities) of unconventional hulls.

Dr. Simone Mancini
Guest Editor

Manuscript Submission Information

Manuscripts should be submitted online at www.mdpi.com by registering and logging in to this website. Once you are registered, click here to go to the submission form. Manuscripts can be submitted until the deadline. All submissions that pass pre-check are peer-reviewed. Accepted papers will be published continuously in the journal (as soon as accepted) and will be listed together on the special issue website. Research articles, review articles as well as short communications are invited. For planned papers, a title and short abstract (about 100 words) can be sent to the Editorial Office for announcement on this website.

Submitted manuscripts should not have been published previously, nor be under consideration for publication elsewhere (except conference proceedings papers). All manuscripts are thoroughly refereed through a single-blind peer-review process. A guide for authors and other relevant information for submission of manuscripts is available on the Instructions for Authors page. Journal of Marine Science and Engineering is an international peer-reviewed open access monthly journal published by MDPI.

Please visit the Instructions for Authors page before submitting a manuscript. The Article Processing Charge (APC) for publication in this open access journal is 2600 CHF (Swiss Francs). Submitted papers should be well formatted and use good English. Authors may use MDPI's English editing service prior to publication or during author revisions.

Keywords

  • Planing hull
  • Stepped hull
  • SWATH
  • ACV
  • SES
  • WIG
  • Hydrofoils

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Published Papers (4 papers)

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Research

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27 pages, 8389 KiB  
Article
Full-Scale CFD Analysis of Double-M Craft Seakeeping Performance in Regular Head Waves
by Deniz Ozturk, Cihad Delen, Simone Mancini, Mehmet Ozan Serifoglu and Turgay Hizarci
J. Mar. Sci. Eng. 2021, 9(5), 504; https://doi.org/10.3390/jmse9050504 - 8 May 2021
Cited by 11 | Viewed by 3484
Abstract
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 [...] Read more.
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. Full article
(This article belongs to the Special Issue Unconventional Marine Vehicles)
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17 pages, 5154 KiB  
Article
Design, Performance Evaluation and Field Test of a Water Jet Tool for ROV Trencher
by Ji-Hong Li, Mun-Jik Lee, Hyungjoo Kang, Min-Gyu Kim and Gun Rae Cho
J. Mar. Sci. Eng. 2021, 9(3), 296; https://doi.org/10.3390/jmse9030296 - 8 Mar 2021
Cited by 6 | Viewed by 3063
Abstract
ROV trencher is a kind of ROV which trenches the sea floor using a specifically designed tool and buries the subsea cables and pipelines. According to the soil conditions, this trenching method can have two different types, one is mechanical cutting and the [...] Read more.
ROV trencher is a kind of ROV which trenches the sea floor using a specifically designed tool and buries the subsea cables and pipelines. According to the soil conditions, this trenching method can have two different types, one is mechanical cutting and the other one is water jetting. In this paper, we present a water jet tool design method for a 2500 m depth-rated ROV trencher. A series of CFD simulations and laboratory tests with one nozzle, and a ground test using 1:6 scale jetting arm model were carried out to derive and demonstrate the jetting tool design parameters. In October 2018, the constructed ROV trencher was put into the sea trial in the East Sea of Korea to evaluate its final performances. In addition, in December 2019, the trencher was applied in a construction site to bury subsea water pipelines near the Yogji Island in the Korea. Through these two field tests and operation, the trencher was demonstrated for both its operational capability and trenching performance. The main contribution of this paper is that it presents the entire design procedures of water jet tools, including CFD simulations, laboratory tests, field test with 1:6 scaled jetting tool, and the final prototype tool design. These consecutive procedures are carried out in order for us to set up sort of relationship between jetting angle, trench depth, trench speed, and jetting power, from which we can predict and evaluate the trenching performance of the prototype jetting tool. Full article
(This article belongs to the Special Issue Unconventional Marine Vehicles)
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19 pages, 10201 KiB  
Article
Performance Assessment of a Planing Hull Using the Smoothed Particle Hydrodynamics Method
by Bonaventura Tagliafierro, Simone Mancini, Pablo Ropero-Giralda, José M. Domínguez, Alejandro J. C. Crespo and Giacomo Viccione
J. Mar. Sci. Eng. 2021, 9(3), 244; https://doi.org/10.3390/jmse9030244 - 25 Feb 2021
Cited by 28 | Viewed by 5763
Abstract
Computational Fluid Dynamics simulations of planing hulls are generally considered less reliable than simulations of displacement hulls. This is due to the flow complexity around planing hulls, especially in the bow region, where the sprays are formed. The recent and constant increasing of [...] Read more.
Computational Fluid Dynamics simulations of planing hulls are generally considered less reliable than simulations of displacement hulls. This is due to the flow complexity around planing hulls, especially in the bow region, where the sprays are formed. The recent and constant increasing of computational capabilities allows simulating planing hull features, with more accurate turbulence models and advanced meshing procedures. However, mesh-based approaches based on the finite volume methods have shown to be limited in capturing all the phenomena around a planing hull. As such, the focus of this study is on evaluating the ability of the Smoothed Particle Hydrodynamics mesh-less method to numerically solve the 3-D flow around a planing hull and simulate more accurately the spray structures, which is a rather challenging task to be performed with mesh-based tools. A novel application of the DualSPHysics code for simulating a planing hull resistance test has been proposed and applied to the parent hull of the Naples warped planing hull Systematic Series. The drag and the running attitudes (heave and dynamic trim angle) are computed for a wide range of Froude’s numbers and discussed concerning experimental values. Full article
(This article belongs to the Special Issue Unconventional Marine Vehicles)
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Review

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27 pages, 3550 KiB  
Review
Hydrodynamics of Biomimetic Marine Propulsion and Trends in Computational Simulations
by M. I. Lamas and C. G. Rodriguez
J. Mar. Sci. Eng. 2020, 8(7), 479; https://doi.org/10.3390/jmse8070479 - 29 Jun 2020
Cited by 24 | Viewed by 5219
Abstract
The aim of the present paper is to provide the state of the works in the field of hydrodynamics and computational simulations to analyze biomimetic marine propulsors. Over the last years, many researchers postulated that some fish movements are more efficient and maneuverable [...] Read more.
The aim of the present paper is to provide the state of the works in the field of hydrodynamics and computational simulations to analyze biomimetic marine propulsors. Over the last years, many researchers postulated that some fish movements are more efficient and maneuverable than traditional rotary propellers, and the most relevant marine propulsors which mimic fishes are shown in the present work. Taking into account the complexity and cost of some experimental setups, numerical models offer an efficient, cheap, and fast alternative tool to analyze biomimetic marine propulsors. Besides, numerical models provide information that cannot be obtained using experimental techniques. Since the literature about trends in computational simulations is still scarce, this paper also recalls the hydrodynamics of the swimming modes occurring in fish and summarizes the more relevant lines of investigation of computational models. Full article
(This article belongs to the Special Issue Unconventional Marine Vehicles)
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