Primary Research on Drag Reduction of Train Based on Plasma Flow
Gao Guoqiang1, Yan Xin1, Peng Kaisheng1, Wei Wenfu1, Wang Yangming2
1. School of Electrical Engineering Southwest Jiaotong University Chengdu 610031 China; 2. State Grid Chengdu Power Supply Company Chengdu 610031 China
Abstract：As the speed of high-speed trains continues to increase, the aerodynamic drag has become a key factor affecting the speed and energy consumption of trains. Compared with the conventional flow control technology, surface dielectric barrier discharge (SDBD) has numerous advantages such as no moving parts, fast time response and lightweight, which shows a strong potential in suppressing the boundary layer separation of the high-speed train. In order to investigate the effects of SDBD on flow control of the high-speed train, both experiments and numerical simulation have been conducted. Based on experiments, the flow control effects of different electrode shapes on the train model have been compared. The aspects of the discharge power consumption, discharge intensity and induced airflow velocity are considered. The results indicate that the linear and serrate electrodes have higher power consumption and discharge intensity than the square and serpentine electrodes, while the square and serpentine electrodes have higher electromechanical efficiency than the others. Visualization of the airflow field around a train model with different electrodes was realized by the smoke visualization experiment. It is found that the square electrode and the serpentine electrode have stronger flow separation inhibition than the linear and serrated ones. In addition, the flow around a train model was simulated based on Navier-Stokes equations, where the plasma actuator was solved by the Suzen model. The results implicate that the plasma actuator has a primary effect on drag reduction of the high-speed train, and with the increase of applied voltage, the suppression effect of flow separation is more remarkable.
高国强, 颜馨, 彭开晟, 魏文赋, 王阳明. 等离子体流动技术在列车减阻应用上的初步研究[J]. 电工技术学报, 2019, 34(4): 855-862.
Gao Guoqiang, Yan Xin, Peng Kaisheng, Wei Wenfu, Wang Yangming. Primary Research on Drag Reduction of Train Based on Plasma Flow. Transactions of China Electrotechnical Society, 2019, 34(4): 855-862.
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2019, Vol. 34 
