Effectiveness of blowing for improving the high-speed trains aerodynamics

Shkvar, E. O.; Jamea, A.; Cai, Jian-Chen; Kryzhanovskyi, Andrii

doi:10.1134/s0869864318050049

Cited by 19 publications

(3 citation statements)

References 7 publications

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“…The best solution reduced the train resistance by up to 10.93% and decreased the frictional resistance on the train surface. Shkvar et al 17 researched the effect of micro-blowing methods on train drag reduction. Chen et al 18 studied the effect of blowing on the crosswind performance of a train and demonstrated that it could enhance train aerodynamics.…”

Section: Introductionmentioning

confidence: 99%

Research on snow prevention in the bogie region based on active blowing method

Lan,

Cai,

Zhang

et al. 2024

Proceedings of the Institution of Mechanical Engineers, Part C:

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To reduce excessive snow accumulation on bogie surfaces during high-speed train operations in cold regions, two active blowing schemes are designed in this study based on the shape of the bogie cavity and the relative position of the brake caliper. The unsteady Reynolds-averaged Navier–Stokes algorithm coupled with a discrete phase model was used to calculate the airflow and snow flow under the train. Moreover, the algorithm is employed to explore the impact of active blowing on the flow field characteristics and snow accumulation in the bogie region. Results show that active blowing changes the upward airflow in the bogie region, causing air at the bottom of the train to flow outwards, carrying off numerous snow particles from the bogie region. Active blowing accelerates the surface friction velocity on the bogie, increases the shear force on snow particles, and effectively reduces the snow accumulation on the bogie surface. The foregoing observation indicates that active blowing has considerable potential for snow accumulation prevention.

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Section: Introductionmentioning

confidence: 99%

Research on snow prevention in the bogie region based on active blowing method

Lan,

Cai,

Zhang

et al. 2024

Proceedings of the Institution of Mechanical Engineers, Part C:

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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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“…Инжекция (вдув) газа через проницаемую поверхность обтекаемого тела является одним из привлекательных методов управления турбулентным пограничным слоем (ПС), использующихся в настоящее время в аэродинамике дозвуковых течений [1][2][3][4][5][6][7][8][9][10]. С появлением новых технологий создания современных проницаемых, прежде всего мелкоперфорированных, материалов возможности управляемого вдува существенно возросли.…”

Section: Introductionunclassified

Towards Flow Visualization in the Region of Air Blowing through the Perforated Section of a Body of Revolution

Kornilov,

Pivovarov,

Popkov

2024

jour

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The results of visualization of a near-wall turbulent flow with air blowing of various intensity through a perforated surface area on an axisymmetric body with an aspect ratio of 25.3 under conditions of an incompressible flow around are presented. It is shown that the use of the laser knife method with seeding the flow with light-scattering particles 1–2 μm in size, formed from a water-based mixture that includes polyglycol, makes it possible to visualize the structural elements of the near-wall flow region, which are technically difficult to detect by traditional measurement methods.

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Effectiveness of blowing for improving the high-speed trains aerodynamics

Cited by 19 publications

References 7 publications

Research on snow prevention in the bogie region based on active blowing method

Research on snow prevention in the bogie region based on active blowing method

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

Towards Flow Visualization in the Region of Air Blowing through the Perforated Section of a Body of Revolution

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