为了提高仿飞羽/尾羽沟槽薄膜的减阻性能，通过计算流体力学(CFD)研究沟槽形貌构型参数(d、α、γ)对壁面压力分布、压差阻力系数以及摩擦力的影响。研究结果表明，当Ma＜1时，沟槽形貌构型参数对壁面受力有显著的影响；特别是，对高压区和低压区中心压力以及随之产生的压差阻力的影响最为明显。当外部流场速度Ma 恒定时，存在最优的沟槽形貌构型(d0、α0、γ0)使仿生沟槽薄膜减阻率最大。
In order to increase the drag reduction rate of riblet film fabricated based on birds’feather,we inves-tigated the effect of riblet geometry parameters d,α,γon wall pressure distribution、pressure drag coefficient and friction.Research results indicated that:there is a significant influence of riblet geometry parameters on wall force.Especially,an obvious reduction of pressure value of high pressure center and low pressure center was observed.While the flow rate Ma was certain,an optimized riblets would lead to the maximum drag reduc-tion.
参考文献
| [1] | 封贝贝;汪家道;陈大融.微米级沟槽表面薄膜的制备及减阻性能研究[J].功能材料,2012(9):1173-1176. |
| [2] | Friedmann, E..The optimal shape of riblets in the viscous sublayer[J].Journal of mathematical fluid mechanics,20102(2):243-265. |
| [3] | 潘光;郭晓娟;胡海豹.半圆形随行波表面流场数值仿真及减阻机理分析[J].系统仿真学报,2006(11):3073-3074,3094. |
上一张
下一张
上一张
下一张
计量
- 下载量()
- 访问量()
文章评分
- 您的评分：
-
10%
-
20%
-
30%
-
40%
-
50%