涡

During deep ＆ ultra-deep well exploration process, with.drilling time being longer, the bigger inside force of drill pipe to case, the casing wear problem becomes more serious.

在深井超深井勘探过程中，由于径向力、涡动、横向振动等因素的存在，随着钻井时间的增长，钻柱作用于套管内壁的侧向力增大，导致套管磨损的问题越来越严重。

Based on the measurement of carbon flux by the methods of eddy covariance and static chamber/gas chromatogram, a comparison was made between the two methods in evaluating ecosystem respiration over winter wheat-summer maize double cropland and Kobresia humilis alpine meadow.

基于涡度相关法和静态箱／气相色谱法的碳通量观测数据，对比分析了两种方法在评价禹城冬小麦－夏玉米复种农田生态系统和海北高寒矮嵩草草甸生态系统呼吸中的差异。

Its ripples, brinks and holes.

它的波纹，浅滩和涡穴。

A high-speed camera is used to visualize the flow structures,and Laser Doppler Velocity is employed for velocity measurement.The osculations are conducted on the two-dimensional hydrofoil section,based on a single-fluid model of the cavitation:the liquid/vapor mixture is considered as a homogeneous fluid whose eompsition is regulated by mass tranfer equation.The RNG k-ε turbulence model with modified eddy viscosity coefficient is used for computing,and the coefficient is related to the vapor and liquid densities in cavitated regions for simulating the cavitating flow.

实验采用高速录像技术观察了云状空化随时间的结构变化，应用 LDV 测量了云状空化条件下翼型周围的速度分布；采用 N-S 方程和基于空泡动力学方程的空化模型计算了绕水翼云状空化流场，湍流模型采用了 RNG k-ε方程，为了改善空化流动的计算精度，引入了一种与空化区域水汽相密度相关的系数，对湍流涡黏性系数进行了修正。

The osculations are conducted on the two-dimensional hydrofoil section,based on a single-fluid model of the cavitation:the liquid/vapor mixture is considered as a homogeneous fluid whose eompsition is regulated by mass tranfer equation.The RNG k-ε turbulence model with modified eddy viscosity coefficient is used for computing,and the coefficient is related to the vapor and liquid densities in cavitated regions for simulating the cavitating flow.

实验采用高速录像技术观察了云状空化随时间的结构变化，应用 LDV 测量了云状空化条件下翼型周围的速度分布；采用 N-S 方程和基于空泡动力学方程的空化模型计算了绕水翼云状空化流场，湍流模型采用了 RNG k-ε方程，为了改善空化流动的计算精度，引入了一种与空化区域水汽相密度相关的系数，对湍流涡黏性系数进行了修正。

Enjoying the reputation of "the biggest energy base in east China", Huaibei coal district consists of four big coal fields: Suixiao, Suzhou, Linhuan, and Guoyang. It has extraordinarily abundant underground resources, with a possible coal storage capacity of 35 billion tons. At the same time, it covers all kinds of excellent coals. There are 8 categories: gas coal, fat coal, coking coal,1/3 coking coal, lean coal, dry-burning coal, anthracite coal and dandered coal, among which, coking coal, fat coal and lean coal are rare categories in China.

被誉为华东最大能源基地之一的淮北矿区，包含濉萧、宿州、临涣、涡阳四大煤田，地下资源异常丰富，煤炭远景储量350亿吨，煤质优良，煤种齐全，有气煤、肥煤、焦煤、1/3焦煤、瘦煤、贫煤、无烟煤、天然焦等八大种类，其中焦煤、肥煤、瘦煤为国家稀缺煤种。

This paper explored successfully the qualitative and quantitative analysis of flow field in pipeline imposed on ultrasonic flowmeter. With the installation of the flow conditioner, the non-symmetry flow and swirl flow of disturbant factors were effectively reduced.

本论文成功的探讨管流场对超音波流量计定性与定量的影响，流场因为90度弯头、T型管、…等影响流场稳定的因素存在，若不装整流器，所产生流场的不对称性及涡漩，将会持续到43.5D以上。

An oil film whirl case appeared on a set of power equipment was investigated.

对大机组因润滑油入口温度偏低导致的电机轴承油膜涡动故障实例的系统特征进行了分析。

The Rosemount 8800 Vortex Flowmeters are suitable for liquid, gas, and steam applications.

罗斯蒙特8800涡街流量计适用于液体，气体和蒸汽应用。

Lower velocities found in steam pipes will reduce the capacity of vortex flowmeters.

速度低中发现蒸汽管道将减少能力的涡街流量计。

With Death guitarist Schuldiner adopting vocal duties, the band made a major impact on the scene.

随着死亡的吉他手Schuldiner接受主唱的职务，乐队在现实中树立了重要的影响。

But he could still end up breakfasting on Swiss-government issue muesli because all six are accused of nicking around 45 million pounds they should have paid to FIFA.

不过他最后仍有可能沦为瑞士政府&议事餐桌&上的一道早餐，因为这所有六个人都被指控把本应支付给国际足联的大约4500万英镑骗了个精光。