王靖宇,周申申,胡兴军?覮,惠政.基于等离子体的GTS模型气动减阻研究[J].湖南大学学报:自然科学版,2020,(6):24~33
基于等离子体的GTS模型气动减阻研究
Research on Aerodynamic Drag Reduction of GTS Model Based on Plasma
  
DOI:
中文关键词:  等离子体  激励电压  地面运输系统模型  汽车空气动力学  主动流动控制  车辆工程
英文关键词:plasma  excitation voltage  Ground Transportation System(GTS) model  automobile aerodynamics  active flow control  vehicle engineering
基金项目:
作者单位
王靖宇,周申申,胡兴军?覮,惠政 (吉林大学 汽车仿真与控制国家重点实验室吉林 长春 130012) 
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中文摘要:
      为探究等离子体对类厢式货车的气动减阻效果,以GTS模型为研究对象,采用数值仿真的方法,分别研究了当来流风速为20 m/s时,3个位置处等离子体布置角度、激励电压对GTS模型的气动减阻效果并分析其减阻机理,然后进行组合工况的分析. 研究结果表明,等离子体是通过诱导近壁面气体定向流动使流动分离点后移、推迟流动的分离,从而减小GTS模型前后压差阻力、降低整车气动阻力系数,等离子体布置的位置在流动分离点后方并且靠近流动分离点. 单个位置激励时,等离子体布置在GTS尾部两侧时气动减阻效果最好,最大减阻率为5.09%;组合工况时最大减阻率可达6.01%. 当来流风速一定时,等离子体存在最佳布置角度与激励电压.
英文摘要:
      In order to study the aerodynamic drag reduction effect of the plasma on kind of vans, ground transportation system(GTS) model was taken as the research object. Numerical simulation was used to investigate the aerodynamic drag reduction effect of plasma arrangement angle and excitation voltage at three positions on the GTS model when the incoming wind speed was 20 m/s,and the drag reduction mechanism was analyzed. Then, the combined working conditions were analyzed. The results show that plasma can make the separation point of the flow move back and delay the separation of the flow by inducing the directional flow of gas near the wall, so as to reduce the pressure difference between the front and rear of the GTS model and reduce the aerodynamic drag coefficient of the vehicle. Moreover, plasma should be set behind and close to the flow separation point. The aerodynamic drag reduction effect is the best when plasma is applied to both sides of the tail of GTS at a single position, and the maximum drag reduction rate is 5.09%. The maximum drag reduction rate can reach 6.01% under combined condition. When the incoming wind velocity is constant, the plasma has the optimal arrangement angle and excitation voltage.
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