A Study of spatiotemporal features of sweeping jets acting on afterbody vortices using low-operation-rate stereo PIV

Chen, Xiaodong; Zhong, Shan; Ozer, Ozgun; Kennaugh, Andrew; Liu, Tanghong; Gao, Guangjun

doi:10.1016/j.expthermflusci.2024.111244

Experimental Thermal and Fluid Science

2024

DOI: 10.1016/j.expthermflusci.2024.111244

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A Study of spatiotemporal features of sweeping jets acting on afterbody vortices using low-operation-rate stereo PIV

Xiaodong Chen,

Shan Zhong,

Ozgun Ozer

et al.

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Cited by 4 publications

References 29 publications

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Turbulence approaches for numerical predictions of vehicle-like afterbody vortex flows

Guo,

Chen,

Liu

et al. 2024

International Journal of Mechanical Sciences

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Turbulence approaches for numerical predictions of vehicle-like afterbody vortex flows

Guo,

Chen,

Liu

et al. 2024

International Journal of Mechanical Sciences

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Mitigation of crosswind effects on high-speed trains using vortex generators

Xu,

Liu,

Shi

et al. 2024

Physics of Fluids

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Vortex generators can enhance the operational safety of high-speed trains and offer effective anti-rolling performance. This paper investigates the influence of vortex generator installation angles on the aerodynamic characteristics of trains. The Improved Delayed Detached Eddy Simulation method is used to analyze the leeward side vortex structure. It is found that when the angle between the vortex generators and the relative wind is 30°, the rolling moment of the train is minimized, as it significantly reduces side forces while preventing excessive growth of lift force inducing rolling moment. The reduction in rolling moment of the train by vortex generators is attributed to the suppression of leeward side trailing vortices of the train, which delays flow separation at the roof of the train, inducing a downward trend in the separated flow. Dynamic Mode Decomposition reveals that vortex generators do not alter the stability of near-body trailing vortices but enhance the pulsatile characteristics of far-body trailing vortices, which do not affect the pressure distribution on the leeward side of the train.

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Aerodynamics effects of rear-mounted porous plate in cylindrical flow at different Reynold numbers

Zhang,

Liu,

Chen

et al. 2024

Engineering Applications of Computational Fluid Mechanics

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A Study of spatiotemporal features of sweeping jets acting on afterbody vortices using low-operation-rate stereo PIV

Cited by 4 publications

References 29 publications

Turbulence approaches for numerical predictions of vehicle-like afterbody vortex flows

Turbulence approaches for numerical predictions of vehicle-like afterbody vortex flows

Mitigation of crosswind effects on high-speed trains using vortex generators

Aerodynamics effects of rear-mounted porous plate in cylindrical flow at different Reynold numbers

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