查询词典 vortex flow

According to the understanding of the flow characteristics, a mechanism of formation of vortex streets has been proposed to be the absolute instability of the wake, and several methods of flow control have been developed and shown successful.

根据表面流动及尾流特性的研究结果，从流动稳定性的角度提出了尾流中涡街产生的机理，在于尾流中存在着绝对不稳定的区域。基于对流动特性的理解，从改变流动稳定性的角度，寻求各种流动控制方法。试验结果表明这些方法是成功的。

The medium is water and the inner flow field of vortex pump is rotating flow with constant angular velocity, three dimensional, and incompressible turbulent flow.

数值模拟计算选取工作介质为清水，并认为是牛顿流体且局部各向同性；认为旋流泵的内部流场是以定常角速度绕固定轴的旋转流场，属于复杂的三维不可压湍流流动。

The solver is used to investigate laminar and turbulent separated flows around a 6:1 prolate spheroid at high incidence angles and their effects on hydrodynamic forces. The second separation flows are successfully identified in both laminar and turbulent flow simulations. The computations are shown to agree well with available experimental and numerical data and the physics of 3D large-scale flow separations and vortex shedding are confirmed.

应用所开发的求解器，以6：1长椭球体为算例计算了回转体在大攻角下定常斜航运动时的三维粘性流场及水动力，对层流流动和湍流流动分别进行了计算，分析了层流与湍流分离流动和涡旋产生的特点及其对水动力的影响；计算结果与他人的试验和计算数据比较，吻合程度良好，表明应用本求解器能够正确模拟这种以层流/湍流分离流为主的复杂粘性流动，得到相当精确的水动力，检验和验证了该求解器精确模拟回转体在大攻角下的粘性分离流动和计算水动力的能力。

Our main products are: H Series, DK Series metal tube rotameter, VFM-type vortex flowmeter, DW18 Series Flow Switch, DWM1000 electronic flow switches and plug-in DWM2000 electromagnetic flowmeter, BM51, BW25 Series Level Gauge, BM17 , BM34 series liquid level switches, etc., the company is the German company based in China Krohne only metal tube rotameter service and maintenance centers.

公司主要产品有：H系列、DK系列金属管浮子流量计、 VFM型涡街流量计、DW18系列流量开关、DWM1000 电子式流量开关和DWM2000插入式电磁流量计、 BM51、BW25系列液位计、BM17、BM34系列液位开关等，本公司是德国KROHNE公司设在中国唯一的金属管浮子流量计服务及维修中心。

Main business: Sales Main Products: Temperature instrumentation, pressure instrumentation, flow meters, material / liquid level instruments, metering equipment, control systems thermocouples, thermal resistors, wire compensation, pressure gauge, transmitter, pressure transmitter, Smart Transmitter, Level Transmitter, Flow Meter, Orifice flowmeters, electromagnetic flowmeter, vortex flowmeter, Verabar, metal tube rotameter, gas flowmeter, no NG Paperless Recorder, indicating regulator, regulator, hand fuck, and Flow Totalizer, level transmitter, pressure calibrator, process calibrator, digital pressure gauge, check simulation device, auto-calibration system.

主要业务∶销售主营产品：温度仪表，压力仪表，流量仪表，物/液位仪表，计量仪器，控制系统热电偶，热电阻，补偿导线，压力表，变送器，压力变送器，智能变送器，液位变送器，流量计，孔板流量计，电磁流量计，涡街流量计，威力巴流量计，金属管浮子流量计，气体流量计，无仪纸记录仪，显示调节仪，调节器，手操器，流量积算仪，液位变送器，压力校验仪，过程校验仪，数字压力计，校验仿真仪，自动校验系统。

Results show that there is much local secondary flow in square cyclone besides main vortex, such as spiral down-stream near surface and spiral up-steam at central zone. The secondary flow is one of the effect factors on the collection performance of square cyclone. The cyclone geometry size affects on the intensity and the position of the secondary flow, and then affects on the separation efficiency of the cyclone.

结果表明：方形分离器内除外涡旋与内涡旋等主流外，还存在许多局部的二次流，这些二次流是影响分离器的分离效率的主要因素之一；结构参数的变化对二次流的强度及位置产生影响，进而影响分离器的分离效率。

Flow disciplinarian of different PH indicator polymer solution and newtonianliquid in annulus line had been studied, and found speed distributing, vortex,streamline of annulus line, analytic flow field distributing in annulus and eccentricsituation and compared the results with prevenient schloar, some results different fromprevenient results are get, shch as the relation of average velocity and maxiumvelocity is not less with the viscosity exponent under the annular line, the fluid speedaffect the relation.

应用 PIV 分别研究了不同浓度的聚合物溶液以及牛顿流体在垂直环空管道中的流动规律，得到了环空管道中流体的速度分布情况、涡量情况、流线情况，分析了同心和偏心情况下环空管道内的流场分布规律，并与前人的计算结果进行了比较，得出了一些与以前不同的结论：同心情况下平均流速与最大流速的关系，并不是完全与粘性指数 n 值有关系，还与管道内流动的流动速度有关系，当速度较小时，两者的差别就小，速度大时，不符合这种规律。

Then the flow in the curved pipe and reducing pipe was simulated through using CFD software, know that fluid passing curved pipe, reducing pipe can form secondary flow, vortex shedding, circumfluence, occur separation of boundary layer and periodic circulation flow, make the fluid pulsant, then cause the pipe vibrancy.

然后再应用通用CFD软件对具有弯曲和变径的热风炉管内流场进行模拟，得到当流体流过弯管、文氏管后形成了二次流、环流，并发生边界层分离和周期性旋涡脱落，它们会使后面的管流处于脉动状态，脉动状态的流体在管内流动时，会引起管道系统产生振动。

Numerical simulations on tip clearance flow in Aachen 1-1/2 axial-flow turbine stages are performed. The formation and development of tip clearance flow and tip vortex and the influences on turbine performances are investigated.

以Aachen一级半轴流透平为研究对象，采用数值模拟手段对不同动叶顶部间隙情况下的间隙流进行了分析，研究了间隙流和间隙涡的形成、发展形式及其时透平性能的影响。

In an admirable error bound, the numerical simulation had the close results with experiment by the characteristic curve of cold mass flow fraction, as well as Thermodynamics model of vortex tube, So Thermodynamic theory hypothesis was available to explain Ranque-Hilsch effect of vortex tube.

在误差允许的范围内，涡流管冷流率特征曲线描述的结果与涡流管热力学理论给出的结果非常相近，说明涡流管热力学理论假设能够描述Ranque-Hilsch效应。

In the United States, chronic alcoholism and hepatitis C are the most common ones.

在美国，慢性酒精中毒，肝炎是最常见的。

If you have any questions, you can contact me anytime.

如果有任何问题，你可以随时联系我。