实验结果表明当壁面粗糙度超过1%时摩擦系数随着壁面相对粗糙度的增加而增加。
The friction factor obtained from the experiments increases with the surface roughness increase when the relative roughness is greater 1%.
若流线型物体表面的摩擦阻力系数仅为相对粗糙度的函数，则形状阻力系数与雷诺数无关。
Since if the frictional resistance coefficient is a function of relative roughness, then the form resistance coefficient is independent of the Reynolds number.
对于不同粗糙程度的壁面，在同一流量条件下的糙率系数会随着相对粗糙度的增大而增大。
The roughness coefficient increases when the relative roughness of the surface becomes larger under the same condition of discharge.
结果表明，相同周期数情况下线性渐变dbr相对于其他两种结构粗糙度最小，具有良好的表面形貌，可以应用于垂直腔面发射激光器的研制。
It is shown that the interface linear graded DBR has the minimum roughness and better surface morphology, which can be used in the fabrication of vertical cavity surface emitting lasers.
探讨了具有不同表面粗糙度的工具和相对高度毛坯，在变形时单位压力的变化情况；
The change in the specific roll pressure of workblanks is investigated as the tool surface roughness and the relative height of workblanks are changed.
当相对波度为高频的粗糙度时，只需考虑表面形貌的幅值效应。
But, when relative waviness comes into roughness, only the amplitude effect of surface topography should be considered.
当相对波度为高频的粗糙度时，只需考虑表面形貌的幅值效应。
But, when relative waviness comes into roughness, only the amplitude effect of surface topography should be considered.
应用推荐