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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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Hai An, Po Yang, Hanyu Zhang and Xinquan Liu
In this work, a novel numerical method for studying the influence of gas types on drag reduction by microbubble injection is presented. Aimed at the microbubble drag reduction (MBDR) process for different types of gases, the mass transfer velocity of dif...
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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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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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Hongbo Wang, Wenbiao Gan and Daochun Li
This paper presents a fuel saving double channel wing (FADCW) configuration for a propeller driven aircraft to reduce fuel consumption. In pursuit of this objective, FADCW configuration combines the tractor propeller layout and over-the-wing propeller la...
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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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Jae-Sung Oh, Taehak Kang, Seokgyun Ham, Kwan-Sup Lee, Yong-Jun Jang, Hong-Sun Ryou and Jaiyoung Ryu
The Hyperloop system is a new concept that allows a train to travel through a near-vacuum tunnel at transonic speeds. Aerodynamic drag is one of the most important factors in analyzing such systems. The blockage ratio (BR), pod speed/length, tube pressur...
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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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Qimin Liang, Bairu Xia, Baolin Liu, Zhen Nie and Baokui Gao
The multistage stimulation technology of horizontal wells has brought huge benefits to the development of oil and gas fields. However, the completion string with packers often encounters stuck due to the large drag in the horizontal section, causing huge...
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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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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
F
D
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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Yufei Zhang and Yuhui Yin
This study computationally evaluates the riblet drag reduction effect considering the effect of sweep angle. An implicit large eddy simulation is performed on a channel flow and an infinite swept wing. First, three different inclined angles between the r...
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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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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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Abdullah Khan, Imran Shah, Shahid Aziz, Muhammad Waqas, Uzair Khaleeq uz Zaman and Dong-Won Jung
The bullet head plays a principal role in the modern enlargement of an efficient bullet. A bullet?s main design parameters depend upon the lift and drag forces acting on the head. The factors in a bullet?s shape design that affect bullets? lift and drag ...
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Mukesh Upadhyay, Ayeon Kim, Heehyang Kim, Dongjun Lim and Hankwon Lim
Accurate prediction of the hydrodynamic profile is important for circulating fluidized bed (CFB) reactor design and scale-up. Multiphase computational fluid dynamics (CFD) simulation with interphase momentum exchange is key to accurately predict the gas-...
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Frank Lemmer, Wei Yu and Po Wen Cheng
Methods for coupled aero-hydro-servo-elastic time-domain simulations of Floating Offshore Wind Turbines (FOWTs) have been successfully developed. One of the present challenges is a realistic approximation of the viscous drag of the wetted members of the ...
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