为了研究转子密实度对导流罩水轮机的影响,建立导流罩水轮机的三维数值模型,利用CFD方法考察多组不同实度叶片下的导流罩水轮机性能参数和流场流速及压力分布。结果显示,额定流速下叶片实度的改变对导流罩式水轮机的水动力性能产生显著影响,实度增加,最大功率系数下降,且导流罩对涵道内流体的增速作用减弱。
Abstract
The aim of this study was to investigate the influence of rotor solidity on performance of the ducted tidal turbine. The three-dimensional numerical model of the ducted tidal turbine was established. CFD method was used to investigate the performance parameters, flow field velocity and pressure distribution of the ducted tidal turbine with different solidity blades. By comparing the results, it is showed that variation of blade solidity has significant influence on hydrodynamic performance of ducted turbine working in rated tidal stream velocity. The maximum power coefficient of the turbine decreases with the increase of solidity. Moreover, the ducting effect of the shroud on the fluid velocity growth with the increase of rotor's solidity is weakened.
关键词
潮流能 /
CFD /
水轮机 /
性能系数 /
密实度
Key words
tidal power /
CFD /
tidal turbine /
performance coefficient /
solidity
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基金
国家重点研发计划（2018YFB1501903）; 山东省重点研发计划（2019GGX103012）
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