Results 11 to 20 of about 284,390 (182)
Investigating the effect of rotational degree of freedom on a circular cylinder at low reynolds number in cross flow [PDF]
, 2011 Numerical simulations of Vortex-Induced Vibrations (VIV) of a circular cylinder in cross flow with a rotational degree of freedom about its axis have been carried out by means of a finite-volume method.
Wissink, J, Bahai, H, Madani, SH
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Drag Characteristics and Reduction Test for Hub of Coaxial-rotor Helicopter
Hangkong gongcheng jinzhan, 2020 The drag of coaxial helicopter hub accounts is more than 50% of the total helicopter's waste drag, so it is necessary to research the drag characteristics and reduction design of the hub. Wind tunnel test is carried out for a coaxial helicopter hub model,
LONG Haibin, WU Yuping
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Zhongguo Jianchuan Yanjiu, 2022 ObjectivesFlow separation increases the drag and noise of underwater vehicles, and influences the controllability of their control surfaces. Therefore, the influence of slip caused by superhydrophobic surfaces on drag reduction and flow separation is ...
Wei CHEN, Wenjun LENG, Peng HE, Lei WANG
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Effect of Vortex Generators on Airfoil NACA 632-415 to Aerodynamic Characteristics Using CFD
International Journal of Electrical, Energy and Power System Engineering, 2023 To determine the aircraft’s flight performance, the airfoil type must be considered when designing the wing. A vortex can form when the airfoil travels through a fluid stream with a difference in velocity and pressure around it.
Rosyida Permatasari, Gusty Widyawati
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Aerospace, 2023 Based on the adjoint method, the afterbody of a military transport aircraft was optimized and designed to meet engineering constraints under real flight conditions.
Hanyue Rao +4 more
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Research on the drag reduction characteristics and mechanism of a cylinder covered with porous media
AIP Advances, 2023 As an effective drag reduction control method, porous media have attracted extensive attention in various engineering fields. In this paper, the large eddy simulation method is used to study the flow problem around a cylinder with and without porous ...
Lei Ji +5 more
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Aerospace, 2022 Previous studies have implied that the AR (aspect ratio) of the transverse groove significantly affects the stability of the boundary vortex within the groove and thus drives the variation in the drag-reduction rate.
Zhiping Li, Long He, Yueren Zuo, Bo Meng
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Effect of vortex generator on the flow field over a conventional delta wing in subsonic flow condition at higher angles of attack [PDF]
FME Transactions, 2021 Flow over a conventional delta wing has been studied experimentally at a subsonic flow of 20 m/sec and the flow field developed at higher angle of attack varying from 10° to 20° has been captured.
Patil Manthan +5 more
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Fast numerical evaluation of flow fields with vortex cells [PDF]
, 2009 A vortex cell (in this paper) is an aerodynamically shaped cavity in the surface of a body, for example a wing, designed specially to trap the separated vortex within it, thus preventing large-scale unsteady vortex shedding from the wing.
Chernyshenko, S. +3 more
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Vortex drag in the quantum Hall effect [PDF]
Journal of Experimental and Theoretical Physics Letters, 1998 A new model of momentum and electric field transfer between two adjacent 2D electron systems in the quantum Hall effect is proposed. The drag effect is due to momentum transfer from the vortex system of one layer to the vortex system of another layer. The remarkable result of this approach is a periodic change of sign of the dragged electric field as a
openaire +3 more sources