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Afzal Ahmed, Manousos Valyrakis, Abdul Razzaq Ghumman, Rashid Farooq, Ghufran Ahmed Pasha, Shahmir Janjua and Ali Raza
This study examines the impact of upstream structures on the bulk drag coefficient of vegetation through experimental means, which has not been previously conducted. An embankment model was placed upstream of the vegetation, both with and without a moat/...
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Pengwei Hu, Ying Cui, Chenyu Zhao, Yanan Li and Boyang Li
Due to the interference between the main hull and the outrigger of the pentamaran, resistance is greatly affected. Therefore, research on the pentamaran front outrigger inclination angle has further practical significance for reducing resistance. In this...
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Yihan Xing, Marek Jan Janocha, Guang Yin and Muk Chen Ong
The Subsea Shuttle Tanker (SST) was proposed by Equinor as an alternative to subsea pipelines and surface tankers for the transportation of liquid carbon dioxide (CO2) from existing offshore/land facilities to marginal subsea fields. In contrast to highl...
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Jinchao Xu, Qiong Chen, Yun Li, Jianxu Zhou, Jianfeng An, Xiujun Yan and Yan Guo
Generally, the operation of the horizontally-framed miter gate in a ship lock should consider the effects of hydrodynamic resistance. If over-filling or over-emptying exists and the miter gate opens with reverse head, the hydrodynamic resistance will inc...
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Osman Turan, Yigit Kemal Demirel, Sandy Day, Tahsin Tezdogan
Pág. 1649 - 1658
An extensive series of towing tests using flat plates covered with artificial barnacles were carried out at the Kelvin Hydrodynamics Laboratory (KHL) at the University of Strathclyde. The tests were designed to examine the effect of the coverage percenta...
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Inno Gatin, Juvel Cokic, Darjan Romic and Jo?ko Parunov
Submersible vessels designed to operate at low speeds are often designed with an intricate exostructure, as well as other elements that are located outside of the main pressure hull. Exostructure elements are often of cylindrical or rectangular shape, po...
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Dibo Pan, Xiaojun Xu and Bolong Liu
In order to reduce the additional resistance of high-speed amphibious vehicles, Flanks are designed on the concave grooves. As a new drag reduction attachment, the principle of Flanks is analyzed and discussed in detail. In this paper, the HSAV model and...
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Ana-Maria Chiro?ca and Liliana Rusu
An alternative to experiments is the use of numerical model tests, where the performances of ships can be evaluated entirely by computer simulations. In this paper, the free surface viscous flow around a bare hull model is simulated with three Computatio...
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Trung-Kien Le, Ngo Van He, Ngo Van Hien and Ngoc-Tam Bui
In this study, the effect of bow shape on resistance acting on a hull in regular head waves was investigated by applying a commercial Computational Fluid Dynamics (CFD) code. For this purpose, the hydrodynamic performance as well as the resistance of shi...
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Yaroslav Doroshenko,Ihor Rybitskyi
Pág. 28 - 34
CFD simulation investigated turbulent flows in equal gas pipeline tees, in which the gas flow completely moves from the main line to the branch. The study was performed for tees of different geometry ? stamped with different bending radii of the transiti...
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Yunlong Ma, Qiaogao Huang, Guang Pan and Pengcheng Gao
Collective motion is a unique biological habit of manta rays. As the most basic unit, the hydrodynamic mechanism of tandem gliding deserves further study. In this paper, a numerical simulation method was used to explore the influence of the front-to-back...
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Stefano Zaghi, Giulio Dubbioso, Riccardo Broglia, Roberto Muscari
Pág. 1562 - 1570
The high costs associated with the use of research oceanographic vessels and the maturity of the unmanned surface vehicles (USV) makes now possible to develop systems for monitoring coastal areas based on networks of independent USVs. This type of vessel...
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Hai Luo, Jiangming Ding, Jiabing Jiang, Lingxun Li, Jie Gong and Ning Lyu
Pump-jets have a relatively high propulsion efficiency at medium speed and in heavy-load conditions for wheeled amphibious vehicles. However, the geometry of amphibious vehicles is very special due to the installation requirements of the pump-jet, which ...
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Luis Daniel Leal-Ruiz, Clara Paola Camargo-Díaz, Edwin Paipa-Sanabria, Claudia Castro-Faccetti and John E. Candelo-Becerra
Hydrodynamic performance is an essential factor in the design of a watercraft, and the navigation scenario determines the complexity of its operation. This study aims to identify the effect of speed and length on the hydrodynamic behavior of a semi-plani...
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Shuling Chen, Beilei Zou, Changzhi Han and Shiqiang Yan
Bow shape has been recognized as an important factor influencing the seakeeping performance and added resistance of ships. This paper presents a numerical comparative study on added resistance and seakeeping of model ships with ?X-bow? and a wave-piercin...
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Shengchun Tong, Guorong Li, Jinfang Li, Xilai Li, Chengdong Jiang, Jianyun Zhao, Haili Zhu, Yabin Liu, Wenting Chen and Xiasong Hu
The plateau pika (Ochotona curzoniae) actively contributes to soil erosion and meadow degradation in western China?s Yellow River source zone. This study aimed to elucidate the effects of the pika mound numbers on the hydrodynamic characteristics and soi...
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Kai Dong, Xianzhou Wang, Donglei Zhang, Liwei Liu and Dakui Feng
The simulations of submarine sailing near the free surface with long-crested waves have been conducted in this study using an in-house viscous URANS solver with an overset grid approach. First, the verification and validation procedures were performed to...
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Florin Pacuraru, Andreea Mandru and Adham Bekhit
The scope of the present study is to investigate the effects of various geometrical hull features, such as tunnels, spray rails and whiskers on the hydrodynamic performance of a high-speed planing hull. The criteria being tested to emphasize the boat per...
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Guangsheng Su, Hailong Shen and Yumin Su
The central hull is the most important structure in the planing trimaran. In order to gain insight into the relationship between hydrodynamic performance and main hull shape, experimental tests and numerical simulations were carried out for volume Froude...
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Luuk Barendse, Vera M. van Bergeijk, Weiqiu Chen, Jord J. Warmink, Aroen Mughal, Dorian Hill and Suzanne J. M. H. Hulscher
Wave overtopping can cause erosion on the landward slope due to high flow velocities and turbulence that cause high stresses on the cover. Innovative block revetments such as Grassblocks protect the subsoil of the dike against erosion. The blocks are per...
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