| 1. | Mechanism of drag reduction by spanwise wall oscillation in turbulent channel flow
壁面展向周期振动的槽道湍流减阻机理的研究 |
| 2. | And a parametric method is used for the modeling of the pin fin , spanwise rib , and chordwise rib after delebrately studying their regular structures
并深入研究了扰流柱，纵向肋，横向肋这几种内型典型结构的参数化造型方法。 |
| 3. | With increasing convective mach number the streamwise fluctuation intensity varies little but the transverse and spanwise intensity along with the thickness growth rate decrease
随着对流马赫数的增加，流向脉动强度变化不大，横向和展向脉动强度减小，混合层的扩张率随之减小。 |
| 4. | The present studies suggest that mode a spontaneously emerges in the wake preceding all the other spanwise modes . then it excites the linear stable mode b through the nonlinear interactions among the various spanwise modes
Re = 300时模式a和b均线性不稳定，模式b由于增长率较高，首先取代二维尾迹，而后随着模式a的增长尾迹中模式a和b共存。 |
| 5. | To improve the efficiency of solution , the solution method to determine the cavitation range of blade is carried out for each chordwise string , the interaction between strings is included by spanwise iterative procedure
为了提高求解效率，本文在确定螺旋桨桨叶上空泡范围时采用的求解方法是针对每一个弦向“条带”进行的， “条带”之间的相互影响通过沿桨叶展向的迭代考虑。 |
| 6. | The typical coherent large scale structures include the single spanwise vortex , the pairing vortexes with same signs , which are similar to the structures in the weak - shearing jet , and the vortex pair composed of two vortexes with opposite signs
典型的拟序大涡结构包括单个的展向大涡、有相同符号的两涡组成的配对涡(与弱剪切射流中类似)及由符号相反的两涡组成的涡对组合。 |
| 7. | By comparing the calculated results and test data for a multi - stage axial compressor , this method demonstrates that it could assist in predicting the characteristics of multistage axial compressor and spanwise parameter distribution under off design working conditions
对一台多级轴流压气机的计算结果与试验数据的对比分析表明，该方法能较好地预测多级轴流压气机的特性和非设计工况下级间参数的分布。 |
| 8. | The spanwise characteristic length determines the transition features and global properties of the wake . especially for the specific spanwise characteristic length linear stable mode can dominate the wake in place of mode a and determine the spanwise phase difference of the primary vortices shedding
尤其值得注意的是发现在特定的展向特征长度下线性稳定的展向模态会取代模式a而在尾迹中占优并决定卡门涡脱落的展向相位差。 |
| 9. | Abstract : in this paper , the effect of pre - stress on peen - forming is studied by experiments , the results show that pre - stress can change the relationship between pre - deformation and pre - stress shot peen deformation , and that 0 . 05 % 0 . 1 % pre - strain is comparetively suitable to improve the spanwise rectilinearity of shot peen - forming configuration surface
文摘:对预应力喷丸成形进行了试验研究，指出预应力可以改变其对应的预变形与预应力喷丸变形之间的大小关系，在以改善喷丸型面纵向直线度为主要目的的预应力喷丸成形中，预应变取值0 . 5 / 1000 1 / 1000较为适宜。 |
| 10. | The 3d simulation result shows characteristics as well as creating , developing and dissipation process of the microjet . the results show good agreement with experimental results . the numerical study reveals the spanwise instability of vortex pairs , resulting in the breakdown of the coherent vortex structure
三维微射流流场的数值模拟再现了实验所观察到的旋涡对的生成、发展及其相干性的消失过程；揭示了旋涡对沿展向的不稳定性是旋涡对相干性消失的主要原因。 |
