Bottom: Plan view and cross section of a bionic shark skin (riblet film made by 3m) for reducing resistance on aircraft.

底部：计划和跨期的仿生鲨鱼皮节(里布·莱特电影3m公司制造)为减少飞机的阻力。

It is employed the concept of multi-scale coherent structures to study the mechanism of riblet surface drag reduction in turbulent boundary layer.

将湍流多尺度相干结构的概念引入沟槽壁面湍流边界层减阻机理的研究。

According to the characteristic of riblet structure, computation region, grids and flow parameters are dealt with reasonably. Results are as follows.

针对翼型表面脊状结构的特点，在数值计算过程中对其计算域、计算网格及流动参数进行了合理的处理。

Exterior flow field measurement above smooth and different riblet surfaces was carried out in a low speed wind tunnel by means of hot-wire anemometry.

利用热线风速仪，对光滑表面和多个脊状表面在低速风洞中进行了表面流场测试。

In addition, numerical simulations of turbulent flow over riblet surface are carried out in 7 kinds of pressure gradients. The effect of pressure gradient is analyzed.

同时还对7种压力梯度下沟槽表面流场进行模拟，研究了压力梯度对减阻效果的影响。