本文数值模拟了多涡结构在边界层中的非线性演化过程。
The evolution of vortexes in the boundary layer are numerically simulated.
因此，南海环流的多涡结构与中尺度波动之间存在着一定的联系。
Thus, there exist some relationship between the multi-eddy structure of the South China Sea circulation and mesoscale fluctuation.
实验中发现一种新型涡结构，它的特征与典型的发卡涡正好相反。
A new kind of vortical structure, whose features are contrary to those of the hairpin vortex, was observed in the present experiments.
数值研究表明，后缘形状、折合频率等对涡结构演化有重要影响。
It is shown that in the present numerical investigations, the trailing edge shape and the reduced frequency have an important influence on the vortex evolution.
由实验结果可得到两种明显的尾迹涡结构、即射流尾迹涡和横流尾迹涡。
Two kinds of distinctive wake vortices were identified from the experimental results, namely the jet wake vortices and the crossflow wake vortices.
细涡丝在涡辫区的三维演化形成趋向流场最大拉伸变形方向的流向涡结构。
The thin vortex filament deforms three-dimensionally in the braid and generates stream-wise vortex structures which incline to the region maximum deformation direction of the flow field.
模式模拟结果展现了南海流场的季节特征，在模式分辨率下表现出了多涡结构。
The simulated results show the seasonal characteristics and multi-eddy structure of the South China Sea current field.
采用离散涡方法模拟了两种不同形状哨嘴的喷嘴出口流场旋涡结构和压力分布。
The discrete vortex method was adopted to simulate and analyze the vortex structure and pressure distribution of the flow field at the nozzle exit.
利用涡结构对光波通过高速流场的光学传输特性进行建模，就必须进行涡结构的识别。
It's necessary to recognize the different vortices, when aero-optical distortion caused by hypersonic flow is studied using vortex structure as the turbulence model.
本文对后台阶分离流动中涡结构的演变进行了大涡模拟，研究了流场结构的变化规律。
In this paper, the evolution of eddy structures in the backward-facing step flow was studied by using large eddy simulation.
结果表明，南沙南部海域不仅存在多涡结构，而且此多涡结构还存在明显的季节性变化。
It is shown from the computed results that there is a multi-eddy structure in the southern south China sea, and there are obvious seasonal variations in the multi-eddy structure.
平面混合涡结构的演化和旋涡相互作用的研究，是湍流拟序结构研究中的两个重要方面。
Vortex structure in shear layer and the interaction among vortices are two important aspect of coherent structure …
此外，发现开度较小时尾水管内存在明显的涡带和回流涡结构，容易导致机组运行的不稳定；
Besides, a notable vortex rope and a reverse flow structure exist in the draft tube in smaller wicket gate openings, which can easily lead to the instability in operation of the pump-turbine.
本文对动失速型非定常分离涡结构的控制方法，在低速风洞中应用相平均测压技术进行了实验研究。
Experimental investigation on the control of dynamic stall type vortex flow was made in a low speed wind tunnel by using phase averaged pressure measurement technique.
计算机仿真结果表明，该方法能有效地进行涡结构识别，为基于涡结构的光学传输精确建模奠定了基础。
The computer simulation shows that the proposed method is valid using vortex structures recognition, and it provides basis for optical propagation model based on turbulence vortex structures.
运用数值方法模拟了细长体在不同攻角条件下亚音速绕流的背涡结构，探讨了非对称涡流的气动力特性。
Subsonic vortical flows over a slender body at different angles of attack were simulated numerically, and the aerodynamic characteristics of asymmetric vortical flow were also investigated.
计算结果表明，旋风分离器内部的流场分为两部分：螺旋通道内比较稳定的流场和筒体中心区域的复合涡结构流场。
It is shown that there are two regions in the cyclone, the steadily tangential flow in the spiral channel and the combined vortex flow in the centre.
本文采用LIF(激光诱导荧光)流动显示和PIV(粒子图像速度场仪)测量对横流冲击射流的尾迹涡结构进行了实验研究。
The wake vortices of an impinging jet in crossflow were studied experimentally by means of laser-induced fluorescence (LIF) flow visualization and particle image velocimetry (PIV) measurement.
结果表明：大涡模拟技术可以得到发动机内湍流流场中详细拟序结构，时均湍流模拟对于火箭发动机内流场时均量的模拟仍有较好的工程精度。
It was shown that the detail construction of turbulence in rocket can be predicted by LES, and the time-averaged method also can give the result with satisfiable engineering precision.
与常规叶片相比，二次流损失较小的后部加载叮型所构成的叶栅内的通道涡在结构上较为稳定。
Compared with conventional blade, the passage vortex structure is more stable in cascade with aft-loaded blade which secondary loss is small.
模拟获得了三维潮流水平与垂直分布结构以及若干个潮致余流涡的水平分布状况。
The horizontal and vertical structures of tidal currents were obtained and the inter-tidal Eurlarian residual circulation was analyzed.
介绍涡街流量计的基本原理、检测方法及其安装结构，提出了现场使用中出现问题的解决方法。
This article recommends the basic principle and test measure as well as the installation structure of vortex street flowmeter, solves the problems occurred on the jobsite application.
这意味着网格湍流能有效抑制剪切层中的大涡和拟序结构。
This means that grid turbulence can effectively suppress the large-scale vortex and coherent structure in the shear layer.
计算结果系统地显示了分离结构随雷诺数的变化情况及分离涡的空间结构。
The results reveal systematically the change of separation structures with Reynolds Number and the spatial forms of separation vortices.
结合探针信号的自相关函数，研究流场湍流结构，发现近尾可能存在大涡拟序结构，而在远尾则没有湍流。
By studying the autocorrelation function of the probe signal, it is found that the large eddy quasi ordering structure likely exists in near wake, but there is no turbulence in far wake.
涡激振动响应预报对于深水海洋结构物的设计是非常重要的。
The prediction of vortex-induced vibration is very important for the design of slender marine structures in deep water.
为证实这一现象，我们通过对中尺度暖涡流场结构分析，提出了中尺度暖涡诱导陆架上升流的必然性。
The structure of mesoscale warm eddy was analyzed in order to verify this phenomenon. The necessity of shelf upwelling induced by mesoscale eddies was thus confirmed.
在此基础上，提出了基于近壁区相干结构流动参数的新型大涡模拟壁面模型。
Based on the coherent structures, a new type of wall model for large-eddy simulation (LES) was established.
在此基础上，提出了基于近壁区相干结构流动参数的新型大涡模拟壁面模型。
Based on the coherent structures, a new type of wall model for large-eddy simulation (LES) was established.
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