The Research on Aerodynamic Drag Reduction and Heat Dissipation Performance of Bogie Bottom Covering
This study explores the optimization of aerodynamic and heat dissipation performance of the bottom of high-speed train bogies,focusing on the impact of different covering schemes on overall performance.Through simulations,wind tunnel tests,and real vehicle testing,the results indicate that using full side skirts and bottom coverings significantly reduces aerodynamic drag by 6.2%and 11.8%,respectively.In terms of heat dissipation performance,both real vehicle tests and simulations show that the temperature in the bogie compartment increases with speed,particularly in the front car,where the temperature rises rapidly,reaching a maximum of 15.5℃.In contrast,the full covering design leads to a more pronounced overall temperature increase,resulting in approximately a 20%reduction in heat dissipation effectiveness compared to the side skirt covering.Nevertheless,the temperature in the bogie area remains within acceptable limits,ensuring the normal operation of critical components.These findings provide important evidence for optimizing high-speed train performance and advance related technologies.