卡门涡街

结果表明：非定常N-S方程数值方法能够正确模拟鱼体运动时的流场和反卡门涡街的形成；

It is shown from the result that the numerical method of unsteady Navier-Stokes Equations could simulate the field of swimming fish and the process of forming of reverse Karman vortex street correctly ;

采用上风有限元方法的卡门涡街模拟

Simulation of the Karman Vortex Street with the Upwind Finite Element Method

运用FLUENT数值仿真软件成功的模拟出流体流经涡街流量传感器时所产生的卡门涡街现象。

It is presented how to successfully simulate the phenomenon of Karman vortex street when fluid passes by vortex flowmeter by using FLUENT software .

高温涡街流量传感器是根据卡门涡街理论，采用高温压电陶瓷制成的敏感器件，本传感器使用PNC型改性偏铌酸铅高温压电陶瓷。

The high temperature vortex flow - sensor is a sensitive part which is made of high temperature piezoelectric ceramics with Karman vortex theory .

数值模拟首先得出了圆柱形稳定杆后的卡门涡街，并进一步给出了火焰锋面在传播中的特征。

Characteristics of wake flow behind the stabilizing rod were obtained .

光纤卡门涡街智能流量计

An Intelligent Carmen Vortex Flowmeter with Fiber-Optic Sensor

本文利用保角变换，用离散涡方法求解了卡门涡街与翼型的相互作用。

Based on the discrete vortex method , a conformal mapping technique is used to solve Karman vortex street-airfoil interaction .

结果显示：当达到一定条件时，尾流出现反卡门涡街，使机翼得到正的推力而产生逆流前行的趋势。

It is shown that the reversed Kaman vortex street was generated , and then the foil get the positive thrust .

雷诺数为16.2时，圆柱后会持续的周期性产生漩涡并脱落，类似宏观现象中的卡门涡街；

When Reynolds number is16.2 , the alternate eddy formation and shedding are repeated and the phenomenon is common to Karman Vortex Street .

压缩拐角激波边界层干扰数值模拟研究平板湍流边界层外区卡门涡街扰动的实验研究

Numerical Simulation Research of Boundary and Shock Wave Interaction over Ramp ; Experimental Investigation of Perturbation by Karman Vortex-Street in Turbulent Boundary Layer Outer Region

平板湍流边界层外区卡门涡街扰动的实验研究带背鳍平板三角翼分离涡流场的显示与测量

Experimental Investigation of Perturbation by Karman Vortex-Street in Turbulent Boundary Layer Outer Region Visualization and measurement study of vortex flow over delta wing with dorsal fins

在此阶段以后，重新生成了类似卡门涡街的更大尺寸的旋转方向相反的上下交错排列的旋涡。

After this stage , it regenerates the larger size vortex , similar to the Karman street , of opposite direction of rotation and up and down staggered .

随着Re的升高，圆柱尾流的速度波动幅度变大，并且涡从柱体脱落的频率加快，卡门涡街纵向变宽，涡街的波动频率变大。

With Reynolds number increase , large-scale structure of the cylinder wake is stretched at higher amplitudes , the frequency of the vortexes shed off the wake fast .

本文作者论述了横向风振与卡门涡街的关系，对新《荷载规范》中横向风振计算公式作了分析，提出了对该公式的一种新的理解思路。

This article discusses the relationship of transverse wind-shaken and karman-eddy-street , analyses the transverse wind-shaken calculating method formula , and raises a new understanding way of this formula .

数值计算发现，雷诺数大100时，会产生卡门涡街现象，圆柱体表面出现压力脉动；

The resolute of numerical calculation indicates that , when Re > 100 , the karman vortex-street appeares , the pressure on the surface of the circle cylinder is pulsing ;

关于卡门涡街形状稳定性的一点分析进入大门之后，即可看见「门人小屋」当初可能是进入该城的关卡。

An analysis of the stability of Karman vortex street configurations Upon entering through the main gates , you will face the Hut of the Caretaker , which may have been an entrance checkpoint .

流体流经圆柱形构筑物时，构筑物后方会产生卡门涡街，并伴随周期性的阻力和升力震荡，严重时会引起构筑物的共振破坏。

Karman Vortex Street will be produced when the fluids flow around the cylindrical structures . The periodic lift force and drag force that the structures suffered may caused resonance and destroy the structures .

结合计算结果对鱼类游动时反卡门涡街的形成和鱼体推力的产生机理进行了分析，并对不同斯特哈尔数对推力的影响进行了研究。

With the computation results , the forming mechanism of reverse Karman vortex street and the thrust to fish when it swim are analyzed , and the influence of different St number to thrust is researched as well .