查询词典 vortex flow

The advantage of CFD numerical simulation especially displays in the development of the new products, it not only can replace theroutine experiment and offer various kinds of flow characteristic parameters by a large margin , It not only can replace conventional experimental substantially provide various flow parameters, and reveals through three-dimensional flow field pattern to optimize design based on detailed. CFD numerical simulation in this text applications will greatly enhance the cage control valve design and the technical level and product quality, reducing cage control valve design and processing cycle, significant cost savings, And optimizes through the flow channel, to reduce fluid flow through the valve of energy loss, improving efficiency in the use of energy have the extremely vital significance.

CFD数值模拟的优势尤其表现在新产品的研制开发中，它不但能大幅度取代常规实验提供各种流动特性参数，而且能通过揭示流场三维分布形态为优化设计提供详细依据；文中所采用CFD方法必将大大提高套筒型调节阀设计的技术含量与产品质量，可缩短调节阀的设计和加工周期，节省大量成本，并且通过流道优化，对降低流体流过调节阀的能量损失，提高能源利用率等具有十分重要的意义。

3The transience multiphase flow software was employed for simulating pipeline's slug flow behavior in this paper. The computational results of OLGA have been interpretted by relevant theory.The changes of pressure and holdup in the slug flow analyzed were explained, and its inherent regularity was also revealed in detail.Through which, the cause to slug flow was found out, and the flow type of slug could be suppress or controlled effectively.

3采用瞬态多相流软件对管道流动特性进行模拟研究，用相关理论解释OLGA软件的计算结果，主要针对段塞流压力、持液率的变化规律进行分析，详尽地揭示其内在规律，确定段塞流产生的原因，并进行模拟控制调节。

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 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。

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。

Flow inside hydroturbine has great influences on its energy characteristics as well as unit stability. In particular, the vortex in the draft tube is an important factor which affects unit stability. Therfore, the research of flow in the hydraulic draft tube is continuouly receiving everbodys attention.

水轮机内部流动，不仅对其能量特性有重要影响，对机组的稳定性也有严重的影响，尤其是尾水管内的旋涡流动更是引起机组稳定性的重要因素，因此，水轮机尾水管内的流动研究一直受到大家的重视。

Flow image velocimetry ; microlight image intensifier ; synchronous pulse illumination ; vortex flow

同步脉冲光源；流动图像测速；微光像增强；旋涡流场

Fighters are characterized by high maneuverability in current and future, in which the flow over the wing will undergo vortex flow...

现代及未来战斗机都是以大迎角机动飞行为其主要特征，机翼的流态要经历涡流，破裂涡流以及完全分离流。

In the experimental investigation of acoustic streaming, flow visualization techniques are used. The flow patterns of the vortex structures in the tube which transform with the variation of Sound Pressure Level of reflecting end are recorded in detail under the resonate frequency of the tube.

在对驻波声流的实验研究中，首先采用了流动显示技术对共振频率下，驻波管中稳定对称的声流旋涡结构随反射端声压级的变化作了全面细致的记录研究。

Chinese traditional virtue is humility and wariness,the compliment and praise to the others should be declination

中国人的传统美德是谦虚谨慎，对别人的恭维和夸奖应是推辞。如

We bought this house on the never-never.

我们以分期付款的方式买下这座房子。