The use of conditioned axial flow impellers to generate a current in test tanks
The use of conditioned axial flow impellers to generate a current in test tanks
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使用经过调节的轴流叶轮在测试池中产生电流
DOI：
10.1016/j.oceaneng.2013.10.016
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发表时间：
2014
影响因子：
5
通讯作者：
Robinson A
中科院分区：
文献类型：
--
作者：
Robinson A
有必要建造新一代的海流和波浪试验水池，以模拟更真实的海况。波的产生和吸收的方法是公认的，但在这种情况下，电流产生的方法还不太成熟。产生水流的一种方法是使用轴流式叶轮。不幸的是，叶轮在产生有效推力的同时，也会在流动中引入高剪切、强湍流波动和轮毂效应的非定常速度。在这里介绍的实验中，蜂窝流动调节直接放置在叶轮下游，用于减少湍流中存在的流动。声学多普勒测速仪（ADV）用于测量三个速度分量，其速率足以消除湍流。一种新的实验安排，使用刷式密封允许ADV穿透管道，而不损害管道的完整性。大量的点测量被用来构建在蜂窝下游的不同位置的速度分布。对三种不同的叶轮速度设置进行了试验，以研究尾流演变。提出的结果将有助于发展的数值模型，并增加了解下游的一个条件叶轮的流动。
It is necessary to build a new generation of current and wave testing tanks to simulate more realistic sea conditions. Methods for wave generation and absorption are well established but those for current generation in this context are less established. One means of producing a current is by using an axial flow impeller. Unfortunately an impeller introduces into the flow unsteady velocities with high shear, strong turbulent fluctuations and hub effects, alongwith the useful thrust. In the experiment presented here honeycomb flow conditioning placed immediately downstream of the impeller is used to reduce the turbulence present in the flow. An Acoustic-Doppler Velocimeter (ADV) is used to measure three velocity components at a rate sufficient to characterise turbulence. A novel experimental arrangement using brush seals allows the ADV to penetrate the duct without compromising the integrity of the duct. A large number of point measurements were used to construct velocity profiles at various positions downstream of the honeycomb. Three different impeller speed settings were tested to investigate wake evolution. The results presented will aid the development of numerical models and increase understanding of the flow downstream of a conditioned impeller.
采用先进面板方法的高性能定子翅片
DOI：
--
发表时间：
2005
期刊：
影响因子：
--
作者：
F. Hayashi;A. Oshima;T. Kuroiwa
通讯作者：
T. Kuroiwa
DOI：
--
发表时间：
2011
期刊：
影响因子：
--
作者：
S. Koç;Serdar Yilmaz;D. Erdem
通讯作者：
D. Erdem