Intelligent Vortex precession flowmeter developed by our company is a new flow instrument at the leading level in our country.
智能旋进旋涡流量计是我公司开发研制的具有国内领先水平的新型气体流量仪表。
With the help of Fluent software and Reynolds Stress Model, numerical simulation was performed on three-dimension strong swirling turbulent flow within a guide vane cyclone tube with slotted vortex finder.
利用Fluent软件和雷诺应力模型对装有分流型芯管的导叶式旋风管内部三维强旋湍流流动进行了数值模拟计算，尤其是将入口环形空间和芯管内的气相流场数值模拟结果与实验结果进行了对比。
Vortex flow sensor is the main product with some advantages inclduing strong anti-knocking performance and long using time because of advanced fittings and antijamming technology.
涡街流量传感器是我公司的主要产品。其电子放大线路均由我公司自行研制开发，因采用先进的元器件和抗干扰技术，与传统的涡街相比具有抗震性强，使用寿命长的特点。
The non-uniform flow behind a rigid cylinder row with a small pitch ratio T/D= 1.5 is characterized by narrow and wide near wakes and multiple frequencies, and the vortex shedding behind a rigid cylinder row with T/D= 2.0 is replicated properly by the simulation results.
此外，还研究了单列自由振动的弹性圆柱在间隙比为2.0时的流体诱导振动问题，结果表明：在大振幅条件下，流体诱导力在x方向和y方向有较强烈的耦合；随着振幅的减小，x方向振动对y方向振动的影响可以忽略，可采用单自由度的动力学模型假设进行计算。
The non-uniform flow behind a rigid cylinder row with a small pitch ratio T/D=1.5 is characterized by narrow and wide near wakes and multiple frequencies, and the vortex shedding behind a rigid cylinder row with T/D=2.0 is replicated properly by the simulation results.
计算模拟结果很好地重现了刚性单列圆柱在小间隙比(1.5)下以宽、窄尾涡交替和多频为特征的非均匀流态，以及间隙比为2.0时的涡脱落现象。
In this paper, the application of PIV in complex flow field test is introduced, such as Poisoeullie flow and flow around a circular cylinder, vortices of cross flow past a horizontal square cylinde, the characteristics of vortex wave flow, vortexes of cross flow past a horizontal circular cylinde, attached saddle point of 3-D separation in juncture flow, swirling flow tundish, unsteady horseshoe vortex structure in juncture flow.
本文阐述了PIV粒子图像测速的基本原理及其在复杂流场测试中的应用状况，如泊肃叶流动及圆柱绕流、横流中水平方柱绕流旋涡、涡旋波流场、横流中近壁水平圆柱绕流旋涡、角区三维分离的附着奇点结构、漩流中间包流场、角区非定常马蹄涡结构。
In this paper, the Strouhal number of two normal triangle cylinder s, occuring in gas liquid two phase vortex street, are studied experimentally in vertically upward gas liquid two phase flow.
本文试验研究了两种规格三角形柱体，在垂直上升气液两相流中，发生气液两相涡街时，气液两相斯托拉赫数的变化规律。
Through the analyses of the time-average flow field and the animated isentropic cartoon, we recognize the characteristics of the flow field, the existence range of the vortex shedding. The interaction of the leading edge and trail edge vortex and corner vortex was investigated, and the rule of their development and their effect to each other were also discussed along with the frequency spectrum analysis.
通过对于流场时均图和等熵动画图的分析，捕捉到了流场的流动特性和流场中旋涡的存在范围，探索了叶片前缘和尾缘的脱落旋涡以及角涡之间的相互作用，相互影响以及这几种旋涡随时间空间变化的运动规律。
The instantaneous process of vortex was analyzed and the movement of circumfluence vortex was obtained in instantaneous flow field.
在瞬时流场中，分析涡的瞬态过程，得到了回流涡的运动情况；根据温室室外涡量分布图，计算出温室的阻力系数为0.565；从互插式连栋温室室内涡旋运动图中可以看出，沿气流方向涡旋在拱1中的变化慢，在拱2、拱3中的变化快。
The flow field around the wing with deployed high lift devices is three-dimensional, viscous and with the complex vortex motion. It is difficult to model the sound field of wing noise sources by the numerical calculation of aerodynamic equations with the current computer condition and numerical scheme.
本文的结果表明襟翼侧缘宽频噪声主要是由于湍流脉动在襟翼侧缘处形成的非定常通量产生的；一个意想不到的结果是，在襟翼侧缘噪声谱中发现了两种不同性质的单音噪声，一种是典型的后缘噪声源，而另一种单音噪声源具有与上述单音相反的指向性。
Orifice plates are the second choice for general duty flow measurement where vortex meters or other types of meters are not suitable or where redundant measurement is required.
在涡流表或其它类型的仪表不适合的普通用途的流量测量，或要求冗余测量的地方，孔板是第二选择。
And there is the flow pattern of cross-flow from hub to shroud at blade inlet. Interblade vortex can also be visible. And there are big back flow regions and cross-flow at blade outlet near crown. There are also serious back flows in the center of conical tube. When the opening becomes bigger, the flow conditions at runner outlet near crown and inlet are improved. The mainstream is located at the center of conical tube. So instability is weakened in conical tube.
小开度时，较小的导叶出流角，使转轮叶片头部受到撞击，叶片上横向流动和背面的叶道涡严重，转轮出口靠上冠处有回流和横向流动，泄水锥下方回流严重；大开度时，转轮进出口流态都得到改善，尾水管锥管中心的不稳定流减弱。
With this method, calculating the flow at the running point of 60% load in the draft tube of a power station, which have a severe stability problem, accordingly gaining the frequency of the vortex flow and supply a gap for computing the unsteady flow in draft tube.
依据该方法，就国内某振动问题比较严重的水电站的尾水管进行了60％负荷工况点的不稳定流场计算，首次通过计算的方法得到了尾水涡带的频率特性，填补了这一领域的空白。
If, during calculation, a vortex crosses an opening with the Environment pressure condition specified at it, this pressure considered as the total pressure at the part of opening through which the flow enters the model and as the static pressure at the part of opening through which the flow leaves the model.
在仿真计算中，如果涡流穿过了被指定环境压力条件的开口，那么在开口的压力流入端被认为是整体压力，在输出端被认为是静压力。
First, the typhoon flow field is decomposed into two parts: the maximum asymmetric vortex and irrotational environmental flow field. Then the maximum asymmetric vortex is also decomposed into two parts: the maximum symmetric vortex and β-gyres. Finally, typhoon Pearl(2006) is simulated by WRF model(weather research and forcasting model), and flow fields at various times at 500hPa...
首先，将台风的流场分解成最大的、不对称的涡旋流场和无旋流场；然后将不对称的涡旋流场分解成最大的对称涡旋和不对称的β涡旋对；最后，利用WRF(weather research and forcasting)模式(V2.1.2)模拟了200601号珍珠台风，并对各时次的500hPa风场用该方法进行分解，结果表明：该方法对台风的运动机理研究和实际的台风路径预测提供了有价值的信息。
First, UWPBL model(The University of Washington Planetary Boundary Layer Model) is used to retrieve typhoon`s sea level pressure from sea surface winds data of SeaWinds which aboard on QuikSCAT and these strength results are analyzed. Then the variational method is applied to decompose the sea surface winds field into two parts: the vortex and irrotational environmental flow field, the UWPBL model is used again to retrieve ShanShan and YaGi typhoons` sea level pressure from the vortex flow field, the results of typhoon`s central positions are analyzed by comparing the results with the results of direct retrieving, NCEP`s data and typhoon annual reports. It turns out that the accuracy of the typhoon`s sea level pressure central position has been obviously improved, This method offers a new idea for the study of typhoon from microwave scatterometer data.
本文首先利用QuikSCAT散射计获取的海面风场资料，利用华盛顿大学行星边界层模式对台风海平面气压场进行反演，并对其强度进行了分析；然后对获取的海面风场，采用变分方法对风场进行分解，分解出无旋和有旋风场，对分解出的有旋风场，再利用UWPBL模式对珊珊和魔羯台风的海平面气压场进行了反演，对所得结果与通常直接反演、NCEP海平面气压场及台风报文资料进行一一对比，结果表明：新的反演定位的方法对台风海平面气压场中心气压的定位精度有了大幅度的提高，此种定位的方法为散射计资料在台风中的实际应用开辟了一条新的思路。
Vortex flow pump small, high-pressure head, small size, simple structure.
旋涡泵的流量小、压头高、体积小、结构简单。
When shallow water is flowing around a shore or solid wall, often occurs a periodic flow phenomenon due to separation, vortex generation and shedding.
浅水流绕过岸边和固壁时常出现分离生涡、脱涡和周期流现象。
Comparing the unsteady flow fields obtained by CFD with the measurement results with SPIV, it can be found that the CFD results can capture the main characteristics of the flow fields observed in the experiment results, however, the precision of the CFD needs to be further improved, and to predict the detail flow structures, such as the tip leakage vortex in the compressor rotor, by CFD still has some difficulties, thus, some work should be done to improve the turbulence model for more accuracy prediction of the flow fields by CFD for the complex flow in turbomachinery.
定常计算结果和非定常计算结果都不能很好地反映出转子叶尖泄漏流，转子尾迹和泄漏流在静子通道中的演化，及其与静子的相互作用等复杂流动情况。开展叶轮机适用的湍流模型研究，对于提高叶轮机内部复杂流动数值模拟的准确性具有非常重要的价值。
The flow sensor of this range is based on the principle of Karman's vortex trail.
在这个范围的流量传感器是基于卡门的旋涡线索的原则。