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铁道科学与工程学报

JOURNAL OF RAILWAY SCIENCE AND ENGINEERING

第11卷    第5期    总第61期    2014年10月

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文章编号:1672-7029(2014)05-0070-07
基于仿生非光滑沟槽的高速列车减阻研究
杜健1,龚明1,田爱琴1,高娜2,李志伟34

(1.中国南车集团 青岛四方机车车辆股份有限公司 ,山东 青岛 266111;
2.中国航空工业空气动力研究院,辽宁 沈阳 110034;
3.中南大学 交通运输工程学院,湖南 长沙 410075;
4.轨道交通安全教育部重点实验室,湖南 长沙 410075
)

摘 要: 为减小高速列车气动阻力,根据仿生非光滑理论,以鲨鱼体表为仿生对象,建立仿生非光滑沟槽的几何外形,采用经风洞试验验证的数值模拟方法,开展仿生非光滑沟槽的减阻效果研究。计算结果表明:仿生非光滑沟槽的存在可以阻碍由湍流运动引起的瞬时横向流动的发生,降低湍流与壁面之间的摩擦阻力;沟槽顶端区域的摩擦阻力系数接近于光滑壁面的摩擦阻力系数,而其余大部分区域内的摩擦阻力系数则小于光滑壁面的摩擦阻力系数;在不同的气流速度(60~160 m/s)下,沟槽壁面的阻力系数均小于光滑壁面的阻力系数,仿生非光滑沟槽的减阻率可达6%以上。

 

关键字: 高速列车;仿生非光滑沟槽;减阻;气动阻力;摩擦阻力

Study on the drag reduction of the high-speed train based on the bionic non-smooth riblets
DU Jian1, GONG Ming1, TIAN Aiqin1, GAO Na2, LI Zhiwei3,4

1. CSR Qingdao Sifang Co. Ltd., Qingdao 266111, China;
2. AVIV Aerodynamics Research Institute, Shenyang 110034, China;
3. School of Traffic & Transportation Engineering, Central South University, Changsha 410075, China;
4.Key Laboratory of Traffic Safety on Track, Ministry of Education, Changsha 410075, China

Abstract:In order to reduce the aerodynamic drag of the high-speed train, the geometry configuration of the bionic non-smooth riblets as an idealized model of shark skin was set up based on the bionic non-smooth theory. And by means of the computational model verified with the wind tunnel test data, study on drag reduction of the bionic non-smooth riblets was carried out. The computational results show that the existence of the bionic non-smooth riblets impedes the generation of the instantaneous lateral flow caused by the turbulence, and reduces the friction drag between the turbulence and the wall. The frictional drag coefficient in the top domain of the riblets is close to that of the smooth wall, while the frictional drag coefficient in the rest domain of the riblets is smaller than that of the smooth wall. For the different flow velocities(60 m/s~160 m/s), the drag coefficient of the non-smooth riblets wall is smaller than that of the smooth wall. Moreover, the drag reduction rate can decrease by more than 6% for the bionic non-smooth riblets.

 

Key words: high-speed train; bionic non-smooth riblets; drag reduction; aerodynamic drag; frictional drag

ISSN 1672-7029
CN 43-1423/U

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