This is caused principally by the vortex core of whirling water in the draft tube.
这种振动主要是由尾水管中的旋涡带所致。
The tangential velocity distribution measured in this study is similar to a vortex core existing along the jet axis.
旋转射流的切向速度分布相当于射流中存在一个旋转的涡核。
The result showed that the stream function of vortex tube was expressed as the superposition of the stream functions of vortex filament within the vortex core.
结果显示：涡管流函数是时间的周期函数，并被表征为一系列在涡核内均匀分布螺旋涡丝流函数的叠加。
Beginning with the prescribed wake model, a Semi Empirical Correction for the vortex core effect on rotor wake is made and free wake calculation is carried out.
首先从预定的广义尾流入手，并引入尖涡涡核作用的半经验修正，对旋翼的自由尾流进行计算分析。
A model is developed for the calculation of the initial rotor tip vortex core radius aiming at eliminating the empirical parameters of the tip vortex in rotor free-vortex wake analysis.
建立了一个旋翼桨尖涡初始涡核半径计算模型，用于消除旋翼自由尾迹分析中桨尖涡涡核半径依靠经验设定的现状。
Around the dark core of an optical vortex, the energy flow carried by the light beam is like a spiral staircase, flowing in a clockwise or counterclockwise direction.
绕着光涡旋的黑暗中心，光束携带的能量流就像螺旋梯，沿着顺时针或者逆时针方向流动。
The swirling vortex of dimension-altering energy consumed Luke, and deposited him far away on the Deep Core world of Byss.
扭曲时空的能量漩涡卷起卢克，把他投到了远在银河深核的比斯星。
This paper gives the circuit analysis of the check amplifier which is the core component of the LUGB series vortex flow transmitter.
介绍了LUGB系列涡街流量变送器的核心部件-检测放大器的电路分析。
The unsteady flow in a draft tube of Francis turbine under the off-design operation is produced by the dynamic behavior of a helical vortex rope with the dead core.
混流式水轮机在非设计工况点下运行时，尾水管内部的非定常流动是由死水域和螺旋涡带的动态行为引起的，尾水管上部的螺旋涡带旋转引起流动的基频脉动。
Degreasing and heat treatment can reduce the gap among nano-crystalline core particles, increase the vortex flowing loss and move down the frequency of core's center.
磁粉芯经脱脂、热处理后纳米晶粉颗粒的间隙减小，使得磁粉芯涡流损耗上升和磁粉芯中心频率下移。
Subsea wellheads are a core technology supporting drilling activities, but their lifespan can be affected by a multitude of factors such as vortex-induced vibrations.
海底井口系统是钻井作业的是关键技术，但它们的工作寿命往往可以受到多种因素的影响。
The size of the hollow core of vortex beam has close relationship with the topological charge.
涡旋光束的空心大小与光束的拓扑荷数有密切关系。
The size of the hollow core of vortex beam has close relationship with the topological charge.
涡旋光束的空心大小与光束的拓扑荷数有密切关系。
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