Research on Heat Dissipation of Bionic Brake Disc of Ginkgo Leaf Veins for High-speed Trains
Braking technology is an important factor affecting the speed of trains,and the heat dissipation ability of brake disc is an important parameter to improve the speed of high-speed trains.In order to improve the heat dissipation ability of the brake disc and reduce the temperature and thermal stress of the brake disc during the braking process,two kinds of bionic brake discs with new structures are designed by taking scales as bionic prototypes.Use fluid simulation software to compare the flow field in different brake discs and then use the thermo-mechanical coupling method to calculate the temperature and thermal stress results of brake discs under the initial speed of 300 km/h in once emergency braking condition.The results show that the new scale bionic brake discs can accelerate the air flow in the brake disc and improve the convective heat transfer coefficient during the braking process.Then the working temperature and thermal stress of the brake disc are also reduced by the new biomimetic structure.To a certain extent,the influence of thermal load on the brake disc is reduced.
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