Unsteady flow characteristics regarding hump instability in the first stage of a multistage pump-turbine in pump mode
Unsteady flow characteristics regarding hump instability in the first stage of a multistage pump-turbine in pump mode
复制标题
泵工况下多级水泵水轮机第一级驼峰不稳定的非定常流动特性
DOI:
10.1016/j.renene.2018.04.069
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发表时间:
2018-11
期刊:
影响因子:
8.7
通讯作者:
Liu Jun
中科院分区:
文献类型:
--
作者:
Yang Jun;Pavesi Giorgio;Liu Xiaohua;Xie Tian;Liu Jun
This article reports the fluid-dynamical analyses of unsteady flow in the first stage of a multistage pump-turbine where hump instability occurs. This stage can be seen as a centrifugal pump with multistage guide vanes in pump mode. Experimental and numerical approaches are adopted to contribute the understanding of the highly complex flow regime inner the test pump. In the experimental test, both dynamic pressure measurement and flow visualization techniques are adopted. A commercial code with detached eddy simulation (DES) model is used to compute the flow regime. The frequency analysis indicates that two unsteady flow patterns with a constant frequency occur in the hump instability region. The numerical and experimental unsteady flow fields are analysed to study the fluid-dynamical features of these unsteady patterns, in order to investigate the origin and reveal their contributions to the hump instability.
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影响因子:
3.2
作者:
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通讯作者:
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影响因子:
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DOI:
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发表时间:
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期刊:
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影响因子:
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David A Johnson;N. Pedersen;C. Jacobsen
DOI:
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发表时间:
2008
期刊:
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影响因子:
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DOI:
10.5075/epfl-thesis-4422
发表时间:
2009
期刊:
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影响因子:
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