vortices

Moving the perturbation location along the circumference gives an expected series of asymmetric vortices.

通过控制微扰动的周向位置可以获得期望的非对称多重涡流场.

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In the experiment, a simplified aircraft model ( with tail wing) is employed to construct a4-vortex wake system consisting of a pair of tip vortices and a pair of counter rotating tail plane vortices.

试验采用简化的飞机模型（有尾翼），建立了包含一对翼尖涡及一对反向旋转的尾翼涡（通过以负迎角安装尾翼得到）的4涡尾流系统。

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Aircraft wake vortices are the particular hydrodynamics properties when it flying. It have intensity, stabilization, standing a long time and space scale large properties.

飞机尾流是飞机飞行时产生的特有流体力学特征，其具有强烈、稳定、持续时间长、空间尺度大等特点。

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The secondary vortices and the corner separation between the end-wall and suction surface of the blade make the stream surfaces warped and twisted rather obviously. A loss core is mainly attributed to the formation of corner separation.

叶栅二次涡和端壁吸力面角区分离引起流面翘曲和扭转，角区分离形成损失核心。

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Optical Vortices in A Thermal Rayleigh Scattering Light Field

散射光场中的光学涡旋

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These results tend to agree with the observations associated with traveling convection vortices and midday sub-auroral patches.

上述结果在趋势上与观测到的输运对流涡旋和亚极光块的运动特征一致。

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Vortices accelerate reaction rates of the unreacted region.

旋涡加速了未反应区的化学反应速率.

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Backflow, separation and vortices result from hub leakage lead to a complex flow structure near hub in the stator passage.

由泄漏流引起的回流、分离和旋涡等使静子中靠近轮毂处流场十分复杂。

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The jet wake vortices occurring in the lee side of the jet show an evident three dimensional movement including the spin and stretch in the horizontal plane as well as the torsion in the vertical plane.

背流面射流尾迹涡不仅有水平面内的旋转和拉伸变形，还存在垂直平面内的扭转，表现出明显的三维流动形态。

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The vortices that are formed on the tangential section, there existed mass transfer between inner and outer parts of fluid.

环隙切剖面上形成的涡，其内部流体都要与涡外部的流体进行质量交换。

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To avoid the damage to economization coal implement resonance in running, the theory that flowing liquid causes the vibration is applied to analyse that the vortices break frequency and overfall vibration frequency should be avoided in the course of ash blow and dust removal.

为了避免锅炉省煤器在运行中产生共振引发的危害，应用流体诱发振动的原理分析了在吹灰除尘过程中应尽力避开漩涡脱落频率fw与湍流抖振频率fb的观点。

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The vortices are caused by quantum-mechanical inference scatterers and are accentuated by evanescent states.

涡流出现是量子相干散射造成的,并与衰减模式的存在有重要关系.

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The result displays the velocity and pressure distributing around the column and presence of vortices.

从模拟出来的流场分布可以清晰地看到圆柱周围速度的分布、压力的分布及漩涡的出现.

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Polar vortices are found on Earth, Jupiter , Mars and Venus, and are colder than their surroundings.

人们在地球 、 木星 、 火星和金星上都发现了极地涡流,它们比周围的气候环境更冷.

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Longitudinal vortices forming on the surface of spillway dam during discharging both through spillway dam and botton outlet

堰、孔双层泄流时坝面形成的纵向旋涡

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The results indicate that the first new main vortex develops from tertiary vortex, while the second and the third new main vortices generate principally from the rolling-up of the separated shear layer.

其中，第1个新生涡由tertiary涡发展而来，而第2个和第3个新生涡则主要由分离剪切层卷绕生成。

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To study the generation mechanism of asymmetric vortices flow over modern flight vehicle, the dynamical process of vortices flow around rocket-shaped cylinder was studied experimentally using streak and laser-induced fluorescence techniques in a 1.2-m water tunnel of Beijing University of Aeronautics and Astronautics.

为探讨现代飞行器非对称流动中主涡的形成机理，利用染色线显示和荧光诱导激光片光技术，在北京航空航天大学1.2m水洞对细长体绕流过程进行了实验研究。

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According to the theory the wave number spectrum of the large vortices mainly depends on the atmospheric conditions in both of the upper and lower layers, such as wind speed, wind direction shear, stratification as well as temperature jump.

根据此理论，大涡的波谱构成主要由上、下层大气中风向、风速、层结以及两层之间的温度跃变等因素决定。

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These vortices developed within 30 minutes or so of each other.

这些涡旋的产生彼此相隔半小时左右.

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By taking advantage of PIV ( Particle Image Velocimetry) technique, the unsteady flow fields around different ribs are captured, which reveals the nonlinear evolution processes of vortices.

用粒子图像测速仪（PIV）设备对不同高度下肋板的非定常绕流场进行了全场测试，揭示了肋板尾流场旋涡随时间推进所经历的非线性演化过程。

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The vortices, produced by the viscous stresses of the blade boundary layer, cast off the blade trail, transport downstream and decay gradually with the homogenization of the flow.

旋涡由叶轮叶片表面边界层的粘性切应力产生，并随流动被输运至下游无叶扩压器，然后随着流动的均匀化而逐渐消失。并计算了应力强度（？）

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The formation and development of these horseshoe vortices were studied and compared.

对这四种马蹄形涡的形成及发展进行了研究和比较。

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The Tensor Denotation of Beltrami Spherical Vortices and Their Symmetry Analysis

Beltrami流动的球涡解的张量表示及其对称性分析

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In the presence of the flow deflector, the generating of the vortices and the separating of the shear layer are avoided thereby the energy loss of the jet nozzle is reduced considerably.

由于喷头中有了导流体，避免了涡流的产生与剪切层的分离，从而大幅度地减少了喷头的能量损失。

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The bumps on a whale's flipper help form vortices that generate more lift, more smoothly.

鱼鳍上突起的部分有助于形成涡旋,也就更增大上升力 、 减小阻力.

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The transport process inside tube is also enhanced by Dean vortices.

由于Dean旋涡的存在,缠绕式膜组件也可促进膜管内的传递.

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The Rankine and Lamb vortex corc models are mixed, and the secondary dis-crete vortices are taken.

试用了混合的Rankine和Lamb涡模型及二次离散涡.

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From aviation safety aspect, we study on the wake vortices real time detection and forecast technology not only can improve the capacity of aviation, in urgent condition, it have significant meaning for air force, navy aviation arms, carrier plane when fast landing and taking-off.

从航空安全的角度看，研究尾流的实时探测和预报技术不仅能够提高民用机场的运力，还对应急条件下空军、海军航空兵和舰载飞机的快速起降具有重要意义。

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And the tabs intensified the circumferential vortices greatly in addition to the generation of streamwise vortices.

并且发现,小突片结构不仅能产生流向涡,而且对周向涡有明显的强化作用.

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There are horse shoe vortex around spur dikes and Karman vortices behind spur dikes.

发现在丁坝的上游会形成马蹄涡,在丁坝的背风面会形成卡门涡.

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