A DDES based on the SST κ–ω turbulence model was used to simulate the aerodynamic characteristics of a braking plate, and the aerodynamic forces on the plate, the flow structure around the plate an...

Numerical study on the effect of a downstream braking plate on the detailed flow field and unsteady aerodynamic characteristics of an upstream braking plate with or without a crosswind

End of vehicle streamlined head was selected as the installation location, and aerodynamic behavior of trains with and without braking plates was compared to analyze the formation of the braking fo...

https://www.tandfonline.com/doi/pdf/10.1080/19942060.2020.1756414

Comparison of different configurations of aerodynamic braking plate on the flow around a high-speed train

The influence of different aerodynamic setups on enhancing a sports car's braking

Comparative study on the effect of aerodynamic braking plates mounted at the inter-carriage region of a high-speed train with pantograph and air-conditioning unit for enhanced braking

Unsteady flow and aerodynamic behavior of high-speed train braking plates with and without crosswinds

This paper proposes the design of an aerodynamic braking device for a high-speed train. The design is based on the parameters of the high-speed train and the working principles of airplane wings. T...

Aerodynamic braking device for high-speed trains: Design, simulation, and experiment

\n The current thermal model of railway disc braking is rather coarse as the heat source is treated to be uniformly distributed. By using a Gaussian mixture function, the thermal behavior of railway disc braking was modeled. Simulations and full-scale rig tests of emergency braking about metro train at 40–100 km/h were conducted. The differences between the maximum temperatures calculated by the Gaussian mixture heat source method (GMHS method) and measurements are 2.56–4.71 °C. The relative errors between the maximum temperatures calculated by the GMHS method and thermal mechanical coupling method (TMC method) are no more than 2.53%. The temperature curves obtained by the GMHS method oscillate about their centerline with the same oscillating period to the TMC method. The time cost by the GMHS method is only 0.91–3.05% of the TMC method at the same conditions. The results indicate that the proposed GMHS method is accurate and efficient, which is more suitable for engineering application.

Modeling and Model Validation of Thermal Behavior of Railway Disc During Single Braking

We used a locomotive and a rail car to examine the working principle of a locomotive braking system. We established models of the locomotive braking system, the locomotive dynamics, and the brake disc thermodynamics and, based on the correlation parameters for each subsystem, built an integrated simulation platform for the locomotive braking system based on Simulink and AMESim. Using this platform, we simulated the characteristics of the pneumatic braking unit, the locomotive braking, and temperature increase in the brake disc under emergency braking conditions. We compared our simulation results with experimental data and the results showed that the integrated simulation platform for the locomotive braking system could successfully be used to study locomotive braking control on the vehicle level. We provide a design optimization method for the development of a braking system, the setting of the anti-skid criterion, and early warning of an increase in the brake disc temperature.

Tian Chun

Papers

Aerodynamic braking device for high-speed trains: Design, simulation, and experiment

Modeling and Model Validation of Thermal Behavior of Railway Disc During Single Braking

Integrated simulation platform for a locomotive braking system