Theoretical, Numerical and Experimental Advances in the Hydrodynamics of Ocean Engineering

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 (20 December 2021) | Viewed by 10672

Special Issue Editors

School of Engineering, Computing and Mathematics, University of Plymouth, Plymouth, UK
Interests: wave energy conversion; marine hydrodynamics; wave–structure interaction; theoretical modeling
College of Engineering, Ocean University of China, Qingdao 266100, China
Interests: wave energy; wave energy conversion; turbine; compressed air motors; hydrofoils
Special Issues, Collections and Topics in MDPI journals
College of Earth and Environmental Sciences, University of Lanzhou, Lanzhou, China
Interests: sediment transport; morpho-dynamics; turbulence and vortex dynamics; fluid-structure interaction; wake flow structure of hydrokinetic turbine
Special Issues, Collections and Topics in MDPI journals
Faculty of Maritime and Transportation, Ningbo University, Ningbo, China
Interests: structural design; coupled modeling and advanced control offshore wind turbines
Special Issues, Collections and Topics in MDPI journals

Special Issue Information

Dear Colleagues,

Ocean engineering (marine and offshore renewable energy conversion, naval architecture, etc.) involves various complicated physical and multifield coupling effects. The hydrodynamics of ocean engineering includes but is not limited to fluid–structure interaction, convection diffusion, energy transformation, sediment transportation, seafloor morphological changes, hydrodynamical environmental impact of marine structures, and survivability under extremes. This Special Issue aims to highlight all recent theoretical, numerical, and experimental advances in the hydrodynamics of ocean engineering. Both original and review articles are welcomed, including but not limited to the following potential topics: marine and offshore renewable energy, naval architecture, oil spill/chemical accident simulation, water quality simulation, sediment transportation and morphology changes, integrated water environment and ecological dynamics simulation, and survivability of structures under an extreme ocean environment. We also encourage contributions outlining the applications of novel techniques that provide important information on this topic.

Dr. Siming Zheng
Prof. Dr. Zhen Liu
Prof. Dr. Yaling Chen
Prof. Dr. Yang Yang
Guest Editors

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

  • Wave/tidal hydrodynamic modelling
  • Naval architecture
  • Fluid mechanics
  • Fluid–structure interaction
  • Marine and offshore renewable energy
  • Environmental protection
  • Oil spill/chemical accident simulation and risk assessment
  • Water quality simulation
  • Port reclamation impact assessment
  • Marine ecohydraulics

Published Papers (3 papers)

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Research

26 pages, 15113 KiB  
Article
Research on the Dynamic Performance of a Novel Floating Offshore Wind Turbine Considering the Fully-Coupled-Effect of the System
J. Mar. Sci. Eng. 2022, 10(3), 341; https://doi.org/10.3390/jmse10030341 - 01 Mar 2022
Cited by 5 | Viewed by 2546
Abstract
Floating offshore wind turbines (FOWTs) still face many challenges in improving platform stability. A fully submersible FOWT platform with inclined side columns is designed to tackle the current technical bottleneck of the FOWT platform, combining the structural characteristics of the semi-submersible and Spar [...] Read more.
Floating offshore wind turbines (FOWTs) still face many challenges in improving platform stability. A fully submersible FOWT platform with inclined side columns is designed to tackle the current technical bottleneck of the FOWT platform, combining the structural characteristics of the semi-submersible and Spar platform. An integrated numerical model of FOWT is established considering the fully coupled effect, and the hydrodynamic performance of the novel FOWT, the semi-submersible FOWT, and the Spar FOWT are compared and analyzed under different wave incidence angles and wave frequencies, as well as the blade and tower dynamic response of the three FOWTs under the coupling effect of wind, wave, and current. The results show that the novel floating platform can significantly optimize the hydrodynamic performance and has a better recovery ability after being subjected to external loads. The novel floating platform can significantly reduce the heave peak and its corresponding wave frequency compared to the semi-submersible platform, reducing the possibility of heave resonance. FOWT operation should ensure positive wave inflow as far as possible to avoid excessive wave forces in the lateral direction. Both blade and tower dynamic response are affected by rotor rotation and tower vibration to varying degrees, while tower dynamic response is mainly affected by platform motion. This study suggests that the application of the novel FOWT concept is feasible and can be an alternative in offshore wind exploitation in deep water. Full article
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19 pages, 4041 KiB  
Article
Study on Buried Depth Protection Index of Submarine Cable Based on Physical and Numerical Modeling
J. Mar. Sci. Eng. 2022, 10(2), 137; https://doi.org/10.3390/jmse10020137 - 20 Jan 2022
Cited by 3 | Viewed by 3215
Abstract
The buried depth of submarine cables is very important to avoid damage on the cable from dropping and dragging anchors. This study focused on the actual engineering needs of submarine power cable protection and laying construction. In order to investigate the buried depth [...] Read more.
The buried depth of submarine cables is very important to avoid damage on the cable from dropping and dragging anchors. This study focused on the actual engineering needs of submarine power cable protection and laying construction. In order to investigate the buried depth protection index of submarine cable, physical model tests, theory analysis, and numerical simulations were conducted in this study. The effects of the bottoming velocity, dropping energy, and anchor mass on the anchor penetration depth were analyzed and investigated. The analytical model based on the impact and drag mechanism is presented to analyze the forces and energy on the anchor. The accuracy and reliable of the model test results are verified by the theory analysis and numerical simulation, indicating that the buried depth protection index of the submarine cable in the research area is recommended to be 3 m. The research results can provide guidance for operation of the submarine cable laying machine and submarine cable protection. Full article
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21 pages, 6061 KiB  
Article
Effects of Second-Order Hydrodynamics on the Dynamic Responses and Fatigue Damage of a 15 MW Floating Offshore Wind Turbine
J. Mar. Sci. Eng. 2021, 9(11), 1232; https://doi.org/10.3390/jmse9111232 - 07 Nov 2021
Cited by 7 | Viewed by 3702
Abstract
In order to investigate the effects of second-order hydrodynamic loads on a 15 MW floating offshore wind turbine (FOWT), this study employs a tool that integrates AQWA and OpenFAST to conduct fully coupled simulations of the FOWT subjected to wind and wave loadings. [...] Read more.
In order to investigate the effects of second-order hydrodynamic loads on a 15 MW floating offshore wind turbine (FOWT), this study employs a tool that integrates AQWA and OpenFAST to conduct fully coupled simulations of the FOWT subjected to wind and wave loadings. The load cases covering normal and extreme conditions are defined based on the met-ocean data observed at a specific site. The results indicate that the second-order wave excitations activate the surge mode of the platform. As a result, the surge motion is increased for each of the examined load case. In addition, the pitch, heave, and yaw motions are underestimated when neglecting the second-order hydrodynamics under the extreme condition. First-order wave excitation is the major contributor to the tower-base bending moments. The fatigue damage of the tower-base under the extreme condition is underestimated by 57.1% if the effect of second-order hydrodynamics is ignored. In addition, the accumulative fatigue damage over 25 years at the tower-base is overestimated by 16.92%. Therefore, it is suggested to consider the effects of second-order wave excitations of the floating platform for the design of the tower to reduce the cost of the FOWT. Full article
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