查询词典 surface drag

In order to study drag reduction characteristics of riblet surface, two kind of different size's rible surface were manufactured on aluminum alloy using quasi-LIGA molding technology.

为了研究脊状表面的减阻特性，利用准LIGA成形技术在铝合金表面加工了两种不同尺寸的矩形脊状结构。

To understand the effect of structure of riblet surface on properties of wall, the apparent contact angle of riblet surface was measured and drag reducing effect of riblet surface was confirmed by water-tunnel experiment.

为了得到脊状结构对壁面物性的影响，对脊状表面进行了疏水性测试，获得了液滴在脊状表面上的表观接触角，并通过水洞试验验证了脊状表面的减阻效果。

The results show that the drag reduction effect is obvious in turbulent flows due to the riblet surface with the comparsion of the momentum loss thicknesses and wall friction stresses of smooth surface and riblet surface.

通过对比脊状表面与光滑表面动量损失厚度和壁面摩擦应力，反映了动量损失厚度的大小与壁面摩擦应力的大小具有一致性，充分证实了脊状表面在湍流中具有一定的减阻效果。

Experimental results show that riblet surface changes field flow structure of boundary layer, restrains turbulent variance, debases turbulence intensity, brings on drag reduction effect and preparation of riblet surface using quasi-LIGA technology is feasible.

试验结果表明，脊状表面改变了边界层内的流场结构，抑制了湍流脉动，降低了湍流度，达到了减阻效果。同时，利用准LIGA成形技术制备脊状表面的方法是可行的。

Experimental results show that the vehicle models with transverse riblets surface have obvious drag reduction effect under certain velocity range, the maximal drag reduction effect is 23.5%.

实验结果表明，具有横向脊状表面的航行器模型在一定来流速度范围内具有很好的减阻效果，实验获得的最大减阻量为23.5%。

In order to study the effect of microstructure on the superhydrophobic solid surface for its drag reduction charactertics, micro-ridges grating structures on the basis of K9 glass flat surface were fabricated using femtosecond laser. Experiments were carried out to measure the rheological characterization of 40% glycerin solution on flat and grating structured K9 glass surfaces using AR-G2 rheometer respectively. Both surfaces were modified with trichloro perfluoroocty silane in drying oven.

为了研究超疏水固体表面的微结构对减阻特性的影响，首先利用飞秒激光加工技术在光滑K9玻璃基面上加工出微脊光栅结构，然后将光滑K9玻璃与光栅结构K9玻璃置于干燥箱内进行硅烷化处理，以降低表面自由能，最后用AR-G2流变仪测量两表面的流变特性，试验用流体为体积分数40%的甘油溶液和水。

Vehicle models with smooth surface and riblets surface were tested respectively at various velocities and attack angles in a wind tunnel. Drag characteristic curves were acquired through tests.

在风洞中对具有光滑表面和脊状表面的航行器模型在不同风速和攻角下进行阻力测试，得到其减阻特性曲线。

Based upon the new explanation of the structure of turbulent boundary layer and the fact that specially designed non-smooth surface can reduce fluid drag,the authors have designed and fabricated the Riblets Drag Reduction Film.

作者根据湍流附面层结构新的解释及非光滑特殊造型表面可以减小流体阻力的事实，作者研制了微肋条减阻薄膜，贴在赛船上参加比赛，获得好成绩[1、2 ] 。

Induced drag occurs when the air flow separates from the surface of a wing, while friction drag is due to the friction between the air and bird moving through the air.

诱导拖动发生时，气流分离，从表面的一翼，而摩擦拖曳是由于摩擦之间的空气和鸟移动通过空气。

The horizontal drag FD, created by the flow, consists of skin friction acting on the surface of the grain and form drag due to a pressure difference on the up-and downstream sides of the grain because of flow separation.

此水平阻速力 FD，由流动所产生，包括着表皮的摩擦加于颗粒的表面以及由粒子上和下流两边所产生之压力差所形成的阻速力，这是因为分开流动所致。

With Death guitarist Schuldiner adopting vocal duties, the band made a major impact on the scene.

随着死亡的吉他手Schuldiner接受主唱的职务，乐队在现实中树立了重要的影响。

But he could still end up breakfasting on Swiss-government issue muesli because all six are accused of nicking around 45 million pounds they should have paid to FIFA.

不过他最后仍有可能沦为瑞士政府&议事餐桌&上的一道早餐，因为这所有六个人都被指控把本应支付给国际足联的大约4500万英镑骗了个精光。