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Yan Xing-Kaeding and Apostolos Papanikolaou
The present study deals with the local optimization of the stern area and of the propulsive efficiency of a battery-driven, fast catamaran vessel. The adopted approach considers a parametric model for the catamaran?s innovative transom stern and a QCM (Q...
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Emanuel A. R. Camacho, Fernando M. S. P. Neves, André R. R. Silva and Jorge M. M. Barata
Natural flight has consistently been the wellspring of many creative minds, yet recreating the propulsive systems of natural flyers is quite hard and challenging. Regarding propulsive systems design, biomimetics offers a wide variety of solutions that ca...
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Ranjan Vepa
In this paper, the methodology of how a dynamic model of a conventional permanent magnet synchronous motor (PMSM) may be modified to model the dynamics of a high-temperature superconductor (HTS) machine is illustrated. Simulations of a typical PMSM opera...
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Ranjan Vepa
In this paper, the methodology of how a dynamic model of a conventional permanent magnet synchronous motor (PMSM) may be modified to model the dynamics of a high-temperature superconductor (HTS) machine is illustrated. Simulations of a typical PMSM opera...
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Jin-Wook Kim, Moon-Chan Kim, Il-Ryong Park, Hanshin Seol, Min-Jea Kim and Woo-Seok Jin
Submarines with pumpjet propulsors have recently been used in many countries to improve their propulsion and noise performance. The pumpjet has the advantage of improving noise and cavitation performance by increasing the pressure inside the duct, and it...
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Jens Kunze and Allan Paull
A preliminary aerodynamic and thermodynamic analysis of a supersonic propeller driven by an electric motor is performed. The analysis is aimed at determining whether such a system is feasible and further and more detailed investigation is warranted. Rece...
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Yeming Lu, Haoran Liu, Xiaofang Wang and Hui Wang
Due to the higher propulsive efficiency, lesser vibration, and better maneuverability, the water jet pump is widely applied to high-speed underwater vehicles. By taking a newly developed water jet pump system as the object, the corresponding underwater v...
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Frank E. Fish, Christian M. Schreiber, Keith W. Moored, Geng Liu, Haibo Dong and Hilary Bart-Smith
The manta is the largest marine organism to swim by dorsoventral oscillation (flapping) of the pectoral fins. The manta has been considered to swim with a high efficiency stroke, but this assertion has not been previously examined. The oscillatory swimmi...
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Qizong Sun, Ertian Hua, Liying Sun, Linfeng Qiu, Yabo Song and Mingwang Xiang
The flapping hydrofoil bionic pump is an innovative hydrodynamic device that utilizes flapping hydrofoil technology. Flapping hydrofoil bionic pumps are crucial in addressing issues like inadequate river hydropower and limited water purification capabili...
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H.J. Prins, M.B. Flikkema, B. Schuiling, Y. Xing-Kaeding, ... S. Paboeuf
Pág. 1591 - 1600
In the FP7 project GRIP, partners have extensively studied Energy Saving Devices which improve the propulsive efficiency of ships. The research has focussed on an early assessment of the performance, yard processes for the installation of an ESD, structu...
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Ruixuan He, Xinjing Wang, Jian Li, Xiaodong Liu and Baowei Song
Recently, inspired by the flippers of humpback whales, researchers have been widely studying leading-edge tubercles for use as passive flow control devices. In this research, we numerically investigated the effects of leading-edge tubercles on a three-di...
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Giuseppe Palaia, Karim Abu Salem and Alessandro A. Quarta
The continuously expanding transport aviation sector has a significant impact on climate change, and measures must be taken to limit its environmental impact. The study of advanced airframes, which may increase the lift-to-drag ratio and structural effic...
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Hongqiang Sang, Jin Zhang, Xiujun Sun, Can Li, Lei Wang and Liwei Wang
A wave glider can convert vertical wave motion into its forward propulsion. There are many factors affecting the propulsion performance of a wave glider. The swing amplitude of hydrofoil can affect the efficiency of hydrofoil to capture wave energy, and ...
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Dimitra E. Anevlavi, Evangelos S. Filippas, Angeliki E. Karperaki and Kostas A. Belibassakis
Recent studies indicate that nature-inspired thrusters based on flexible oscillating foils show enhanced propulsive performance. However, understanding the underlying physics of the fluid?structure interaction (FSI) is essential to improve the efficiency...
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Da-Qing Li, Per Lindell and Sofia Werner
Unexpected low value of the relative rotative efficiency ?R is sometimes noted when scaling the towing tank model-test result with the ITTC-78 method to obtain the propulsive efficiency factors of propellers. The paper explains the causes of this phenome...
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Pedro D. Bravo-Mosquera, Hernán D. Cerón-Muñoz and Fernando M. Catalano
The aerodynamic design of a new aircraft concept was investigated through subsonic wind-tunnel testing using 1:28-scale powered models. The aircraft configuration integrates a box-wing layout with engines located at the rear part of the fuselage. Measure...
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Congcong Cao, Wenya Li, Zhengmao Zhang, Xiawei Yang and Yaxin Xu
Cold spray additive manufacturing (CSAM) shows great potential in titanium-alloy production as it is a solid-state process. However, data published so far have demonstrated the difficulty of producing dense and high-strength Ti alloy parts. Our previous ...
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Shukui Liu, Haoliang Chen, Baoguo Shang and Apostolos Papanikolaou
Ship hull and propeller fouling has a severe impact both on fuel costs and on greenhouse gas emission, thus, it is an important subject to consider when developing a maintenance plan to enhance energy efficiency and reduce gas emissions from ships. This ...
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Yongcheng Li, Jianxin Hu, Qiuzhuo Zhao, Ziying Pan and Zheng Ma
The propulsive performance of a bio-inspired autonomous underwater glider (AUG) with active twin undulatory wings undergoing undulatory motion was investigated by numerically solving the viscous incompressible Navier?Stokes equations, coupled with the im...
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Junmin Mou, Yangying He, Benren Zhang, Shixuan Li and Yong Xiong
Due to the high propulsive efficiency and better maneuverability under high speed, the water-jetted unmanned surface vehicle (USV) is widely studied and used. This paper presents complete maneuvering tests and control algorithm designed for a twin water-...
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