Results 11 to 20 of about 897,659 (282)
Prediction of Drag Reduction Rate in Turbulent Channel Flow Based on BP Neural Network [PDF]
E3S Web of Conferences, 2020 The technology of turbulent drag reduction by viscoelastic additives cannot be widely applied in practical engineering due to the difficulty in judging the effect of drag reduction.
Cao Yuchen, Yang Yongwen
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Experimental investigation of yaw-angle effects on drag reduction rate for trapezoidal riblets
Experimental investigation of yaw-angle effects on drag reduction rate for trapezoidal ribletsPhysical characteristics: Original contains color illustrations 形態 ...
Ayumu Inasawa +4 more
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Study on Aerodynamic Drag Reduction at Tail of 400 km/h EMU with Air Suction-Blowing Combination
Machines, 2023 In order to further reduce the aerodynamic drag of High-speed Electric Multiple Units (EMU), an active flow control drag reduction method combining air suction and blowing is proposed at the rear of the EMU train.
Hongjiang Cui +3 more
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Fabrication and Drag Reduction Performance of Bionic Surfaces Featuring Staggered Shield Scale Structures [PDF]
BiomimeticsTo investigate the drag reduction mechanism of shark skin placoid scales and develop high-efficiency drag-reducing surfaces, this study designed and fabricated a biomimetic shark skin surface featuring staggered microscale groove structures.
Xin Gu, Pan Cao, Xiuqin Bai, Yifeng Fu
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Numerical Study on Drag Reduction of Superhydrophobic Surfaces with Conical Microstructures in Laminar Flow [PDF]
Journal of Applied Fluid MechanicsSuperhydrophobic surfaces have garnered attention for their ability to decrease fluid resistance, which can significantly reduce energy consumption. This study aims to accurately capture critical flow phenomena in a microchannel and explore the internal ...
Y. Xu, C. Ruan, Z. Zhang
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Results in EngineeringThis paper uses the Large-eddy simulation method to investigate the influence of riblet yaw angle on drag reduction rate with different immersion heights, revealing that the vortex structure is gradually transformed from riblet-tip vortex pairs to boundary vortex forms with the increase of yaw angle, and analyzing the influence mechanism of immersion ...
Zhiping Li +4 more
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BMC Chemistry, 2023 Different from common hydrophobic associative polymers, a new hydrophobic associative polyacrylamide (HAPAM) with ultra-long side chains was synthesized and aimed to be used as drag reducer in this work.
Xianwu Jing +3 more
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Research Progress of Air Lubrication Drag Reduction Technology for Ships
Fluids, 2022 Air lubrication is a promising drag reduction technology for ships because it is considered to reduce the skin-friction resistance of ships by changing the energy of turbulent boundary layers.
Hai An, Haozhe Pan, Po Yang
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Journal of Theoretical and Applied Mechanics, 2023 This study investigates the drag reduction effect and mechanism of modified transverse grooves by employing “Constant Width” and “Constant Height” filleting methods on the top and valley of two-dimensional transverse V -shaped grooves.
Zhiping Li +4 more
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Advances in Aerodynamics, 2023 Turbulence drag reduction is of great significance for the range increase of hypersonic flight vehicles. The proposed velocity-temperature coupling control method (Liu et al, Phys Rev Fluids 6:044603, 2021) is further extended to the hypersonic turbulent
Qiang Liu +4 more
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