Numerical study on aerodynamic resistance reduction of high-speed train using vortex generator

Li, Tian; Liang, Hongqin; Zhang, Jie; Zhang, Jiye

doi:10.1080/19942060.2022.2153925

Cited by 32 publications

(10 citation statements)

References 34 publications

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“…Passive control technology does not require additional energy and can only control speci c states, with control parameters that cannot be adjusted in real time. Active ow control technology requires extra energy and can adjust excitation parameters to control the ow eld as needed, making it more e cient [11][12] . As an active ow control technology, suction and blowing combined ow control technology enhances the ability of the uid near the bogie wall to resist pressure gradients by removing low-momentum uid or introducing high-momentum uid.…”

Section: Introductionmentioning

confidence: 99%

Research on Aerodynamic Drag Reduction of EMU Tail Car Bogie on Combined Suction and Blowing

Cui,

Tang,

Guan

et al. 2024

Preprint

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The flow field structure in the bogie region has an important impact on the aerodynamic drag of the EMU. In order to meet the lower aerodynamic drag requirements for further speed increases of EMU trains, this paper adopts numerical simulation method to study the active control drag reduction technology of suction and blowing air combined with bogie. The results indicate that the setting of suction and blowing air holes at the front and rear end plates of the tail bogie has only a drag reduction effect on the pressure drag in the aerodynamic drag of the bogie and tail car. With the change of suction and blowing air speeds, the drag reduction rate of the tail car reaches the optimal value of 3.82% at 0.05U, and the drag reduction rate of the bogie reaches the optimal value of 4.61% at 0.2U. The study on the combined suction and blowing air drag reduction method of the bogie has important significance in breaking through the limitations of traditional bogie aerodynamic drag reduction.

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Section: Introductionmentioning

confidence: 99%

Research on Aerodynamic Drag Reduction of EMU Tail Car Bogie on Combined Suction and Blowing

Cui,

Tang,

Guan

et al. 2024

Preprint

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“…Due to its large capacity, high running speed, and low freight, railway transportation has become a crucial mode for both goods and people [1]. However, a snowy environment may result in various operational problems [2].…”

Section: Introductionmentioning

confidence: 99%

Analysis of Snow Distribution and Displacement in the Bogie Region of a High-Speed Train

Du,

Yu,

Liu

et al. 2024

FDMP

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Snow interacting with a high-speed train can cause the formation of ice in the train bogie region and affect its safety. In this study, a wind-snow multiphase numerical approach is introduced for high-speed train bogies on the basis of the Euler-Lagrange discrete phase model. A particle-wall impact criterion is implemented to account for the presence of snow particles on the surface. Subsequently, numerical simulations are conducted, considering various snow particle diameter distributions and densities. The research results indicate that when the particle diameter is relatively small, the distribution of snow particles in the bogie cavity is relatively uniform. However, as the particle diameter increases, the snow particles in the bogie cavity are mainly located in the rear wheel pairs of the bogie. When the more realistic Rosin-Rammler diameter distribution is applied to snow particles, the positions of snow particles with different diameters vary in the bogie cavity. More precisely, smaller diameter particles are primarily located in the front and upper parts of the bogie cavity, while larger diameter snow particles accumulate at the rear and in the lower parts of the bogie cavity.

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“…Dumitriu et al [14] employed numerical simulations to investigate the impact of a rigid-flexible coupled car body model on the vertical vibration characteristics of the car body. Li et al [15] explored the impact of a vortex generator installed on the tail car on the aerodynamic characteristics of the train. This study showed that the vortex generator in front of the separation point triggered flow separation and destroyed the balance between separation and longitudinal vortex.…”

Section: Introductionmentioning

confidence: 99%

Study on Lateral Vibration of Tail Coach for High-Speed Train under Unsteady Aerodynamic Loads

Li,

Wei

et al. 2023

Vibration

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As the speed of high-speed trains increases, the vehicle’s lateral stability steadily deteriorates. There have been observations of abnormal vibrations in the tail car, particularly on certain sections of the railway line. This study built a high-speed train aerodynamic simulation model for a three-car consist, and a multibody dynamics simulation model for an eight-car consist based on numerical simulations of train aerodynamics and multibody dynamics. It investigated both steady and unsteady aerodynamic loads, flow field characteristics, and the dynamic performance of vehicles under varied aerodynamic loads at 400 km/h. The results indicate that the aerodynamic loads generated during high-speed train operation exhibit highly unsteady characteristics. Steady aerodynamic loads have a relatively minor impact on the vehicle’s dynamic performance, whereas unsteady loads exert a more significant influence. Under unsteady aerodynamic forces, the tail car experiences severe lateral vibrations. The lateral stability index, displacement, velocity, and acceleration of the tail car under unsteady conditions were measured at 2.26, 7.54 mm, and 0.53 m/s2, respectively. These values represent increases of over 17.71%, 148.84%, and 111.24%, respectively, compared to the steady loads. Large oscillation amplitudes result in more significant lateral displacements and accelerations of the vehicle. This phenomenon is a crucial factor contributing to the “tail swing” effect observed in high-speed trains. This study emphasizes the importance of considering unsteady aerodynamic effects in assessing the lateral stability of high-speed trains and highlights the significance of mitigating the adverse impacts of such dynamic responses, particularly in the tail car.

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Numerical study on aerodynamic resistance reduction of high-speed train using vortex generator

Cited by 32 publications

References 34 publications

Research on Aerodynamic Drag Reduction of EMU Tail Car Bogie on Combined Suction and Blowing

Research on Aerodynamic Drag Reduction of EMU Tail Car Bogie on Combined Suction and Blowing

Analysis of Snow Distribution and Displacement in the Bogie Region of a High-Speed Train

Study on Lateral Vibration of Tail Coach for High-Speed Train under Unsteady Aerodynamic Loads

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