In the meantime, the helical vortex rope in draft tube is analyzed by t...
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。
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.
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。
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。
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.
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.
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；
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