Results 21 to 30 of about 6,045 (208)
REFINEMENT OF THE PARAMETERS OF A MATHEMATICAL MODEL OF QUADCOPTER DYNAMICS [PDF]
Scientific Journal of Silesian University of Technology. Series Transport, 2020 Errors in the calculation of the parameters of quadcopter control models at design stage significantly change the desired aerodynamic properties of the drone and make it difficult to control its flight along the intended path. Therefore, to calculate the
Adalat PASHAYEV, Elkhan SABZIEV
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Journal of Marine Science and Engineering, 2021 A coastal wave buoy was lost near Jeju Island, Korea, in late July 2014 and found at Cape Mendocino, USA, in April 2020. The buoy’s journey was simulated with a Lagrangian particle tracking model using surface ocean currents and wind data at 10 m above ...
Seongbong Seo, Young-Gyu Park
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Numerical Simulation Investigation on the Windage Power Loss of a High-Speed Face Gear Drive
Energies, 2019 Reducing the energy consumption and improving the efficiency of high-speed transmission systems are increasingly common goals; the windage power loss is not negligible in these methods.
Yu Dai, Feiyue Ma, Xiang Zhu, Jifu Jia
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Journal of the Textile Machinary Society, 1951 研究目的ラーヂパッケージ、ことにポツト使用の際の動力消費推定の基礎となるゥインデージロスについて、数種の回転体による実験から実験式を導き、これを図式に表示して、ラージパッケージ計画の一資料に供しようとするものである。研究結果実験の結果から、ウインデージ・ロスWwattは、回転体の外径Dm, 高さhm, 回転数Nrev/minとしてW=7.42×10-6D3.8(h+D/10)N2.8なる式で与えられるものとした。この式から計算すると、リング精紡から出発するラージパッケージではウインデージロスのために動力消費がいくぶん増す程度ですむが、大型高回転のポットではウインデージロスだけですでにその経済的価値を失つてしまうことがわかる。ウインデージロスの低下には適当なカバーを附することが有効でふつう30 ...
Sumiji Fujii +2 more
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Research on Windage Power Loss of High-speed Arc Tooth Cylindrical Gear
Jixie chuandong, 2021 For gears running at high speeds， windage power loss is one of the main factors for low transmission efficiency. Computational fluid dynamics（CFD） technology is used to establish the air flow field model around the arc tooth cylindrical gear. The digital
Shuai Mo +5 more
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Modeling of small sea floaters in the central Mediterranean Sea: seasonality of at-sea distributions [PDF]
, 2018 Floating marine debris represent a threat to marine and coastal ecology. Since the Mediterranean basin is one of the highly impacted regions, both by the coastal pollution as well as from sea traffic, the potential harm of a floating pollution on the ...
Kumkar, Yogesh, Shchekinova, Elena
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Numerical Simulation on Windage Power Loss of High-Speed Spur Gear with Baffles
Machines, 2022 Windage power loss (WPL) is significant and cannot be neglected in a study on transmission efficiency and reducing the energy consumption of high-speed gear. The influence mechanism of the baffle on the reduction of WPL needs to be further studied. Based
Yuzhe Zhang +3 more
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Windage Losses of Rotating Cylinder
Journal of the Atomic Energy Society of Japan / Atomic Energy Society of Japan, 1968 An empirical relationship for the windage losses of a rotating inner cylinder in a concentric stationary outer cylinder was obtained as a function of the rotaing speed of the inner cylinder and the gap width between both cylinders, through analysis of theories by Taylor, Davey and Batchelor, and experiments by Wendt, Taylor and Donnelly.
Akira KANAGAWA +2 more
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Energies, 2016 In this paper, a set of correlations for the windage power losses in a 4 kW axial flux permanent magnet synchronous machine (AFPMSM) is presented. In order to have an efficient machine, it is necessary to optimize the total electromagnetic and mechanical
Alireza Rasekh +2 more
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A new paradigm in oil spill modeling for decision making?
Environmental Research Letters, 2014 Contingency plans for large oil spills rely on conducting numerical simulations that would predict the probable transport and fate of oil. Oil spill models vary in complexity from ones that assume a straight-line trajectory of oil on the water surface ...
Michel C Boufadel, Xiaolong Geng
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