| 引用本文: | 谭惠丰,康敬天,卫剑征,王长国.三角形微沟槽飞艇蒙皮表面的流场分析[J].哈尔滨工业大学学报,2014,46(7):32.DOI:10.11918/j.issn.0367-6234.2014.07.006 |
| TAN Huifeng,KANG Jingtian,WEI Jianzheng,WANG Changguo.Flow field analysis of Micro-V shape riblets airship surface[J].Journal of Harbin Institute of Technology,2014,46(7):32.DOI:10.11918/j.issn.0367-6234.2014.07.006 |
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| 摘要: |
| 微米尺度的沟槽是临近空间飞艇大面积减阻的一种可行的减阻形式．以临近空间飞艇减阻为研究背景,通过采用k-ω SST湍流模式,对微米尺度的三角形沟槽进行了流场分析,得到了三角形沟槽壁面流的速度场和压力场． 通过计算不同尺寸三角形微沟槽的减阻率和沟槽内的流线形状,分析了微米尺度沟槽的减阻机理和不同沟槽尺寸对减阻能力的影响．研究表明,沟槽内的流线形状对沟槽的减阻能力有重要影响,尺寸合适的沟槽可以减小流体和壁面之间的切应力,减小流动阻力,对临近空间飞艇的蒙皮设计和减阻研究提供了一定参考． |
| 关键词: 微沟槽 临近空间飞艇 减阻 蒙皮 |
| DOI：10.11918/j.issn.0367-6234.2014.07.006 |
| 分类号:V214.8 |
| 基金项目:航空科学基金资助项目(2013ZA77001). |
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| Flow field analysis of Micro-V shape riblets airship surface |
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TAN Huifeng, KANG Jingtian, WEI Jianzheng, WANG Changguo
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(Center of Composite Material and Structure, Harbin Institute of Technology, 150001 Harbin, China)
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| Abstract: |
| It is a viable form of drag reduction for airship to use airship envelope with micron-scale grooves. In this paper, the k-ω SST turbulence model is used to analyze the V-shaped micro-riblets. The velocity and pressure field are obtained using this model. Both the drag reduction mechanism for micro-grooves and the influence of different groove size are analyzed by the streamline pattern and the drag reduction rate. The results show that the streamline pattern is an important reason for drag reduction ability, and the grooves with appropriate size can reduce the drag between fluid and wall. |
| Key words: micro-riblets airship drag reduction envelope |
