查询词典 vortex of vector field

Vortex folwmeter ; optical-fiber ; light-frequency modulation ; vortex shedder

涡街流量计；光纤；光频率调制；涡街发生体

According to instantaneous velocity fields and vorticity fields measured with SPIV, detailed analysis of the evolution of tip leakage vortex at both design and near stall conditions is presented in this thesis and the different phases of the evolution of the tip leakage vortex, the formation, becoming unstable and the interaction between small-scale vortices and the mainstream can be clearly observed in the experiment results.

SPIV测量结果表明压气机转子叶尖泄漏涡在设计和近失速状态下均存在形成、发展壮大和失稳分裂的演化过程。

It is found that topological charge of vortex beam influences the interference pattern, i.e., by compared with the straight interference pattern of plane wave, the interference pattern of vortex beam is shifted in the transverse direction as we look from the top of the interference to the bottom, and the magnitude and direction of shift are related to the topological charge.

详细介绍了涡旋光束的拓扑荷数对干涉条纹分布的影响。发现同平面波的竖直干涉条纹相比较，涡旋光束的干涉条纹，从顶部向底部看去，沿着横向出现移动，并且移动的大小和方向与拓扑荷数的取值有关。

The simulation is carried out with the excitation frequency relative to the natural vortex-shedding frequency from the corresponding stationary cylinder taking values in the range which stands for sub- and superharmonic excitation and the oscillation dimensionless amplitudes. Change of these parameters and Reynolds number will lead to the mode synchronization and mode competition and the switching between different vortex shedding modes.

对振动频率和静止圆柱旋涡脱落频率比在一定的超谐和亚谐范围、一定的无量纲振幅范围和不同的雷诺数都作了模拟，发现随这些参数变化将产生旋涡脱落模式的同步、竞争和相互转化现象。

Based on the above study, a program is developed which calculate the modeled subgrid stresses, and is applied to simulate the turbulent flow in a plane channel. The computational result is compared with the data extracted form a DNS database, and the agreement is satisfactory. A numbers of physical phenomenon has been reproduced in the simulation, including hairpin vortex and counter-rotating rolls in near wall region, intermittent vortex structure, the maximum of pressure clustering in wall area and the high-speed fluid sweep into the low speed fluid, and the ability of the LES to simulate turbulent flow is well shown.

在对LES技术学习掌握的基础上，编制了亚网格模型的计算程序，在三维平板通道流动的具体计算中应用大涡模拟技术，并与DNS计算结果进行了比较，得到了满意的结果，三维通道中的重要流动现象被很好的预示出来，包括近壁面的发卡涡，对旋涡，间歇猝发涡结构，压力最大值向壁面的倾斜，高速流体对近壁面流体的下扫，卷掠等，显示了大涡模拟技术对湍流流动模拟的能力。

In the vortex ring gait, the upstroke is aerodynamically passive (there is no bound circulation during this phase, and hence no trailing vortex), and the wings flex and move close to the body to minimize drag.

在涡环的步态， upstroke是aerodynamically被动的（是没有约束，流通在这一阶段，因此没有尾随涡），和翅膀flex和动议接近身体，以减少阻力。

Experiments exposed that the inner flow of tooth space in the micro-channels was proved to be cycled flow after fully development. For the more, low velocity vortex cavities existed in the vertex angle and inner side of bend angle of straight angle micro-channel, while back flow only appeared in the internal side of bend angle of round angle micro-channel. It's easy to take place deposition in the low velocity vortex cavities, which is the main cause of blocking.

试验发现各类微通道齿间内流充分发展后是一种重复性流动，平角微通道顶角和转角内侧存在低速涡旋区，圆角微通道只在转角内侧出现回流，颗粒在低速涡旋区易发生沉积，是造成堵塞的主要原因。

To simulation of weather patterns, the capability of stimulation to 850hPa is not as good as the one to 500hPa, which may be caused by underlying surface. In addition, the capability of stimulation to 48h is also not as good as the one to 36h. By analysis of result of stimulation to heavy rainfall happened on 8 July, 2003, we have found that rain belt location and its heavy rain core amounts in sensitivity run are preferably displayed by MM5V3. Analyses indicate this event was in close relationship with the southwest low vortex moving to east from the Tibetan Plateau and low-level jet in front of vortex and shear line.

模拟结果总体的TS评分、大雨以上准确率及暴雨以上准确率较MAPS模式都普遍更高；在对天气形势场的模拟能力方面，模式对850hPa上天气形势场的模拟效果不如500hPa上的模拟效果好，其可能原因是受下垫面的影响所致，并且总的看来，36小时的模拟效果优于48小时的模拟效果。

The kernel of the problems stressed are the two: the link path of saddle point to saddle point on the topological structure is instable, so it will break easily with the changing of main control coefficient, and nonlinear bifurcation of the vortex structure along the vortex axis line.

强调了不稳定拓扑结构中的鞍—鞍连接轨线随主控参数变化而"撕裂"、以及旋涡沿轴线的非线性分叉是非对称形成与多涡系演化的途径。

Fierce wind vortex that can not stand woorimalin 'waterspout' quoted in the concept map, iconic pinwheel shape of the vortex in the middle of a battlefield maepyida.

暴风涡——引入了不能站在风眼的"龙卷风"概念的地图，在战场的中间有标志性的风车形态的涡流。

It's bell can reach over a meter in diameter.

它的身体最大可以达到直径1米多。

Now they are overdue and I shall have to pay a fine.

现在他们过期了，我不得不付罚款。