如改变尾水管形状，可以消除涡带压力脉动，减小机组振动。
If the shape of tailrace pipe is changed, the pressure pulse can be removed so that the vibration of generating unit can be reduced.
本文还根据计算结果分析了尾水管内非定常涡带产生和传播的原理。
In the meantime, the helical vortex rope in draft tube is analyzed by t...
水轮机在偏离最优工况运行时，水流的环量会使尾水管中心产生低压并形成涡带。
In case of the turbine is operated departing the optimum condition, the low presure and the vortex band will be established in the draft tube centre by the flow circulation.
在此基础上根据负荷将水轮机运行工况划分为小负荷、涡带、稳定负荷等几个区域。
On the basis of it the turbine's operation state is divided into small-duty, vortex strip, steady-duty etc according to the change in load.
为精确诊断水轮机尾水管涡带，该文提出一种基于小波包特征熵的神经网络故障诊断新方法。
To diagnose accurately vortex rope in draft tube of hydraulic turbine, this paper presents a new method of fault diagnosis based on wavelet packet and neural network.
此外，发现开度较小时尾水管内存在明显的涡带和回流涡结构，容易导致机组运行的不稳定；
Besides, a notable vortex rope and a reverse flow structure exist in the draft tube in smaller wicket gate openings, which can easily lead to the instability in operation of the pump-turbine.
结果表明： 北京地区高低层配置符合干侵入三维模型， 中层以上的干区与水汽图像的暗区相吻合， 同时配合有自高纬向低纬传播的高位涡带， 北京地区干侵入特征明显。
The main results are as follows: The dry zone and high potential area above middle-level corresponded well with dark zone in WV image, which showed the dry intrusion was obvious.
本文介绍用涡面元法模拟带扰流片的翼型低速无粘分离绕流。
A vortex panel method is presented to simulate low speed inviscid separated flow past an airfoil with a spoiler.
本文通过模型试验研究涡室-竖井内消能系统，用内设阻涡坎的涡室连接泄洪洞和竖井，带盲洞的消力井连接竖井和导流洞。
The system consists of a swirling chamber, two vertical buckets on its wall, a drop shaft and a water cushion pit with one blind tunnel.
南下冷空气在江南一带被来自低纬的西南暖湿气流和东南暖湿气流所切断，形成一高位涡冷空气中心。
The air was cut by the Southwest and Southeast warm moist air flow from low latitude in the vicinity of South of the Yangtze River, and formed a high PV center of cold air.
随着神经网络的涡电流和温度分布的预测上不断移动的薄导电带横向磁通感应加热(TFIH)的设备。
With neural network the eddy current and temperature distribution prediction on the continuously moving thin conducting strips in transverse flux induction heating (TFIH) equipment is presented.
对带V型火焰稳定器的模型燃烧室中气液两相化学反应流动进行大涡模拟（LES），研究中采用了欧拉-拉格朗日方法。
The gas-droplet two-phase reacting flow in a model combustor with the V-gutter flame holder is studied by an Eulerian-Lagrangian large-eddy simulation (LES) approach.
太平洋中有一个巨大的涡状形垃圾带，其面积大约是得克萨斯州的两倍，充满着小片塑料和其他碎片。
The Great Pacific Garbage Patch, a swirling vortex roughly twice the size of Texas filled with tiny bits of plastic and other debris.
太平洋中有一个巨大的涡状形垃圾带，其面积大约是得克萨斯州的两倍，充满着小片塑料和其他碎片。
The Great Pacific Garbage Patch, a swirling vortex roughly twice the size of Texas filled with tiny bits of plastic and other debris.
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