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Frédéric Moëns
A multidisciplinary design analysis and optimization process is developed at ONERA for the design of tube and wing and blended wing?body aircraft configurations. This process is composed of different disciplinary modules (geometry, propulsion, aerodynami...
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Arjun Srinivas, Bryson Robertson, Jonah Benjamin Gadasi, Barbara Gwynne Simpson, Pedro Lomónaco and Jesús María Blanco Ilzarbe
The worldwide effort to design and commission floating offshore wind turbines (FOWT) is motivating the need for reliable numerical models that adequately represent their physical behavior under realistic sea states. However, properly representing the hyd...
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Feifei He, Xiaogang Wang, Yun Li, Yiqun Hou, Qiubao Zou and Dengle Shen
Anaerobic metabolism begins before fish reach their critical swimming speed. Anaerobic metabolism affects the swimming ability of fish, which is not conducive to their upward tracking. The initiation of anaerobic metabolism therefore provides a better pr...
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Yingfei Zan, Ruinan Guo, Lihao Yuan and Zhaohui Wu
In underwater towing operations, the drag force and vertical offset angle of towropes are important considerations when choosing and setting up towing equipment. The aim of this paper is to study the variation in drag force, vertical offset angle, resist...
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Johannes Palm, Claes Eskilsson, Lars Bergdahl and Rickard E. Bensow
This paper analyses the nonlinear forces on a moored point-absorbing wave energy converter (WEC) in resonance at prototype scale (1:1) and at model scale (1:16). Three simulation types were used: Reynolds Averaged Navier?Stokes (RANS), Euler and the line...
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Pawel Drag
An optimization task with nonlinear differential-algebraic equations (DAEs) was approached. In special cases in heat and mass transfer engineering, a classical direct shooting approach cannot provide a solution of the DAE system, even in a relatively sma...
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Marlena Drag
A new computer-aided method to design electrospun, nanofibrous mats was implemented and tested. In this work, the standard nonlinear algebraic model led to the terminal fiber diameter FD" role="presentation">FDFD
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being examined in detail. The analys...
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Pawel Drag
In this article, an optimization task with nonlinear differential-algebraic equations (DAEs) is considered. As a main result, a new solution procedure is designed. The computational procedure represents the sequential optimization approach. The proposed ...
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Demis Pandelidis, Sergey Anisimov and Pawel Drag
The aim of this study is to determine which of the heat exchangers is characterized by the highest efficiency in different applications. Various types of evaporative air coolers were compared: a typical counter-flow unit, the same unit operating as a hea...
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Bing Fan and Jie Huang
In the traditional investigations on the drag and heat reduction of hypersonic spiked models, only the aerodynamic calculation is performed, and the structural temperature cannot be obtained. This paper adopted the loosely coupled method to study its eff...
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Yongchan Kim, Junyeop Nam, Tae-Seong Roh and Hyoung Jin Lee
Base drag has a significant effect on the overall drag of a projectile in a supersonic flow. Herein, the base drag and flow characteristics of cold and hot gas flow in a supersonic flow are analyzed via numerical simulations. The hot gas flow is simulate...
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Petri Toivanen, Pekka Janhunen, Jarmo Kivekäs and Meri Mäkelä
A new method of producing robust multi-wire tethers for Coulomb drag applications was developed. The multi-wire structure required for redundancy against the micrometeoroid flux of the space environment is realised through the method of wire twist bondin...
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Zikang Jin, Zonghan Yu, Fanshuo Meng, Wei Zhang, Jingzhi Cui, Xiaolong He, Yuedi Lei and Omer Musa
The parametric design method is widely utilized in the preliminary design stage for hypersonic vehicles; it ensures the fast iteration of configuration, generation, and optimization. This study proposes a novel parametric method for a wide-range, wing-mo...
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Qing Ye, Yongpeng Ou, Guo Xiang and Junjie Chen
Over the years, air lubrication technology has been widely applied to maritime vessels, demonstrating its significant energy-saving and emission-reducing effects. However, the application of this technology in inland waterway transportation faces unique ...
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Igor Korobiichuk, Sergii Kostyk, Vladyslav Shybetskyi and Vladyslav Mogylchak
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Hanyue Rao, Yifu Chen, Yayun Shi, Tihao Yang and Hongyang Liu
Based on the adjoint method, the afterbody of a military transport aircraft was optimized and designed to meet engineering constraints under real flight conditions. Guidance for the key design parameters of the afterbody of the military transport aircraf...
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Yongyuan Li, Guang Sun and Hongwei Han
Aerocapture, the action of delivering a vehicle from a hyperbolic orbit to a planetary orbit by using the aerodynamic force, could potentially lower fuel consumption. By controlling the direction and size of the aerodynamic force, the vehicle can accurat...
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Yuhang Ma, Jiecheng Du, Tihao Yang, Yayun Shi, Libo Wang and Wei Wang
Robust optimization design (ROD) is playing an increasingly significant role in aerodynamic shape optimization and aircraft design. However, an efficient ROD framework that couples uncertainty quantification (UQ) and a powerful optimization algorithm for...
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Toni Holjevic, Sini?a Dru?eta, Luka Grbcic and Marta Alvir
Microplastics (MP) are found in nature in various forms. The transport and settling process of MP particles in water streams is highly influenced by particle size and shape. In order to investigate the impact of particle shape, an experimental analysis o...
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Desheng Zhang, Xin Wang, Ming Zhao, Lin Hong and Xuecheng Li
Remotely operated underwater vehicles (ROVs) have been widely used in deep-sea resource exploitation and industrial engineering operations. To perform these tasks accurately in the deep-sea environment, stable motion control has become a key area of rese...
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