查询词典 vortex

According to the rotor dynamics theory,the vortex mechanism and rule of the rotor are closely related to the collision and friction interaction.

根据转子动力学理论，转子的涡动机理及规律与碰摩作用密切相关，考虑下部钻柱与井壁之间是否发生碰摩作用，应用转子动力学理论建立了2个下部钻柱涡动分析模型，探讨了下部钻柱涡动机理及规律。

Taking advantage of potential vorticity thinking and vortex Rossby wave theory, we verify the existence of waves like VRW that is dynamical mechanism for intensity change.

利用位涡表征的螺旋雨带以及涡旋—Rossby波理论，探讨气旋加强与减弱的成因机理，证实了气旋环流中确实存在有涡旋—Rossby波性质的波动。

Based on the experiment, the flow variation and impact on release works is studied. The vortex theory is adopted to study the side shrinkage angle and optimum step of the bulkhead gate to improve the overflowing condition.

通过试验分析研究了闸后水舌的流态变化规律及其对泄水建筑物的影响；采用涡流理论分析研究闸后水舌侧收缩角的计算方法；根据侧收缩角计算出闸门槽的最优错距，从而改善闸孔出流的水流条件。

The homogeneous vortex theory about fluid is applied to this complex system by using Pfeiffers method and the vorticity of the liquid is only related to time.

应用Pfeiffer关于全充液腔内液体旋度平均化思想研究全充液弦索系统，使液体旋度仅与时间有关。

The theoretical development of internal flow of turbomachinery is then summarized in terms of separation theory, vortex dynamics and flow pattern.

然后分别从分离流动理论、涡动力学和叶轮机械流型三个层次介绍叶轮机械内部流动理论的发展；从平面叶栅、环形叶栅、动态试验和试验技术等方面回顾叶轮机械试验研究进展；从控制方程、数值方法、网格生成等方面综述叶轮机械数值计算研究方法、研究内容及成果等，并概括改善叶轮机械气动性能的方法和现状。最后对叶轮机械内部流动研究进行展望。

A conclusion was drawn that Momentum theory, Vortex theory and Generalized dynamic wake were practicable to get the general design parameters and loads, loads cycles of the rotor were the main vibration excitation, and good dynamic compatibility between rotor and tower is propitious to the well function of the wind turbine unit.

指出动量理论、涡流理论及自由尾涡理论模型是确定风电机组总体设计参数和载荷的依据；叶轮的周期性载荷是机组振动的主要激励，叶轮和塔架良好的动力学相容性有利于机组可靠运行。

Synthesizing the degrees of freedom of both rotor and helicopter body, and involving time derivatives of flap motion coefficient and induced velocity model derived from vortex theory, the governing equations of helicopter maneuvering flight are derived properly, with combination of kinematic equations and dynamic equations.

集旋翼和机体之自由度并计及挥舞运动系数对时间的导数和涡流理论的诱速模型，把运动学方程和动力学方程组合起来，从而导出了机动飞行的控制方程。

The geometry of three dimension vortex sheet of the sides of foil and its trailing were determined by the kinematic boundary condition.

针对三维舵存在的端部梢涡及其尾涡卷起的现象，提出了一种新的考虑端部梢涡卷起的三维短翼理论计算模型。

By means of the present model certain phenomena related to the nonlinear acoustic properties of an orifice, such as the roll-up of the shed vortex sheet and the forming of the Vena-Contracta are simulated. For a sinusoidal sound pressure, the time- history of the average velocity through the orifice is computed, and the nonlinear distortion of the velocity is examined by means of the Fourier decomposition.

依据此模型，对圆孔声学非线性效应的若干特征现象进行了数值模拟，如脱落涡层的卷曲，Vena收缩段的动态形成；在孔板前声压按余弦规律变化的情况下，计算了孔中平均速度的时间历程，并借助于Fourier分解分析了孔中平均速度的畸变情况。

Moreover, to prevent the vorticity from entering into the body, the concept of "residual vorticity" is introduced in the sense that partial circulation of the vortex sheet is remained at the boundary without being diffused into the flow field. Blobs very close to the wall are thus unnecessary.

为避免部分新涡泡太过接近边界，我们引入了「残留涡度」的概念，将离边界甚近之环量转为涡片形式留在边界上，以减少环量进入物体内部之误差。

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。