涡动

钻柱与井壁接触摩擦，使钻柱在低速时也发生涡动。

The drill string will bear side forces along with the direction of rotary motion velocity and enlarge the whirling motion .

试验结果表明：初始转速越高，转子跌落后保护轴承受到的振动冲击越大，跌落持续时间越长，越容易出现涡动现象。

The experimental results show that the vibrations and impacts become larger and drop duration time lasts longer with the increase of initial rotational speed , and then whirling motion is more likely to happen .

海气CO2通量与涡动相关法应用研究进展

Advances in Air-Sea CO_2 Flux Study and the Application of Eddy Covariance Technique

应用涡动相关法计算水热、CO2通量的国内外进展概况

Advances in Applying the Eddy-Covariance Technique to Calculate Heat , Moisture and CO_2 Flux

无限长偏心旋转圆柱间Taylor涡动问题研究

On Taylor Vortex Flow in Infinite-Length Eccentric Cylinders

PDC钻头在井底的涡动分析研究

The Study of the PDC Anti-whirling

目前涡动相关法被认为是国内外测定CO2、水热通量的最可靠方法。

At present eddy-covariance technique ( ECT ) is considered one of the most reliable methods in measuring CO_2 , heat and moisture fluxes .

Timoshenko阻尼转轴的涡动不平衡响应

Whirl unbalance behavior of a Timoshenko rotating shaft with internal viscous and hysteretic damping

汽轮机转子涡动汽流激振力分析与CFD数值模拟

Analysis and CFD ( Computational Fluid Dynamics ) Numerical Simulation of Steam Flow Excitation Force Leading to a Whirling of Steam Turbine Rotors

南海东北部表层水体水平涡动扩散的~（228）Ra示踪研究

A study on horizontal eddy diffusion in the surface water of the northeastern South China Sea Based on ~ ( 228 ) ra tracer

分析非线性涡动裂纹转子中刚度变化比△K，裂纹角β，不平衡参数U对系统分叉及浑沌行为的影响。

Bifurcation and chaos influenced by the ratio △ K of stiffness change , crack angle β and unbalance parameter U of a nonlinear cracked rotor in whirl speed are investigated .

变化涡动粘性系数的Ekman动量近似模式风场结构

Wind structure in a height-dependent eddy viscosity boundary layer model with the Ekman momentum approximation

同时给出了锥形渐扩管内各主要流动参数u、k、紊流耗散率ε和涡动粘性系数νt的分布。

At the same time , the distribution of the main parameters that flow u , k , turbulence dissipation ratio ε and eddy viscosity coefficient ν t are given out in conical diffuser .

作者从Navierstokes方程出发，用涡动粘滞系数模型来封闭波流相互作用下的流动方程，提出了一个求解整个水深内的断面流速分布的方法。

The current eddy viscosity model is applied to close Navier Stokes equations . A model is developed to predict the velocity distribution .

而Stocks流体动力质量使Jeffcott转子系统产生正反向涡动的非协调振动，是引起系统涡动模式变化的重要参数。

The Stock mass is an important parameter inducing the rotor system whirling mode to change , due to its non-concordant vibration in the forward and backward whirling .

密云站LAS观测得到的感热通量与涡动相关的相比，日变化特征更加平滑，且空间代表性更大。

It was also found that the sensible heat flux diurnal variation obtained by LAS in Miyun Station was smoother and with greater spatial representation when it compared to EC measurements .

用数值积分方法分析了大间隙环流中同心Jeffcott转子系统的涡动模式。

The whirling mode of a concentric Jeffcott rotor immersed in large gap annular flow is studied by numerical integration methods .

由涡动相关原始数据得到的温度结构参数更适合于稳定度普适函数fr的确定。

The temperature structure parameter calculated by eddy correlation data was considered more suitable for fixing the stability universal function , the best stability universal function fT_Guyuan was also fixed .

分析了在动载轴承非稳态非线性油膜力作用下，具有横向裂纹柔性轴Jeffcott转子在非线性涡动影响下的动力特性。

An approach about the no-linear whirl dynamic behavior of elastic shaft Jeffcott rotor with a transverse crack , which is supported on the unsteady and no-linear oil film , is presented .

对长白山阔叶红松林2003年生长季的涡动相关实测时间序列进行了去倾修订与超声风速仪倾斜修订，并分析了不同修订方法对森林CO2通量计算值的影响。

Detrending correction and sonic anemometer tilt correction were made to modify the raw time series measured from eddy covariance system in broad-leaved Korean pine forest of Changbai Mountains during the growing season of 2003 , and the impact of different correction methods on CO 2 flux was analyzed quantificationally .

对9F单轴式燃机发生在可倾瓦轴承上的油膜涡动和油膜振荡进行了介绍、分析和诊断。

This paper describes , analyses and diagnoses the oil whirl and whip faults in the tilting pad bearings of the 9F type gas generator set of single shaft .

以转子-轴承系统中短轴承的转子涡动、具有非线性支撑的柔性Jeffcott转子模型的周期响应为研究对象，对吴消元法在转子动力学研究中的应用作了初步探索。

In this paper , the whirl equations of short-bearing model , the steady-state periodic behavior of nonlinear rotor dynamic system in the rotor-bearing system are studied in order to explore the application of Wu method to rotor-bearing system .

滑动轴承-转子系统涡动轨道的瞬态分析

Transient Analysis for Whirling Orbits of a Journal Bearing Rotor System

基于涡动角的裂纹转子模型稳定性分析

Stability Analysis of a Cracked Rotor Model Based on Whirling Angle

关于大气涡动热通量参数化问题研究

On the Parameterization of the Transient Eddy Heat Flux in Atmosphere

台湾海峡西部海域水平涡动交换混合的讨论

On horizontal eddy mixture in western part of Taiwan Strait

热带海洋晴空发生强气流涡动的频率如何？

How often does severe clear air turbulence occur over tropical oceans ?

垂直涡动粘性系数采用混合长度理论。

The vertical eddy viscosity is derived based on the mixing-length theory .

模拟出涡动通量的空间分布和时间变化。

The parameterized eddy fluxes simulatedthe seasonal and latitudinal variations reasonably well .

含变涡动系数的超浅海风暴潮模型

An ultra-shallow water storm surge model with variable eddy viscosity