A Numerical Prediction of Tip Vortices from Tandem Propellers in the Counter-Rotating Type Tidal Stream Power Unit
A Numerical Prediction of Tip Vortices from Tandem Propellers in the Counter-Rotating Type Tidal Stream Power Unit
复制标题
对转式潮汐流发电机组串列螺旋桨叶尖涡的数值预测
DOI：
10.4236/jpee.2017.512009
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发表时间：
2017
期刊：
影响因子：
--
通讯作者：
Pin Liu
中科院分区：
文献类型：
--
作者：
Hoyun Jung;T. Kanemoto;Pin Liu
海洋能有潜力为全世界提供大量可再生能源。潮流能作为海洋能的一种形式，被广泛认为是一种连续、可预测和生态友好的海洋能源。独特的串联螺旋桨，可以反向旋转已被设计成有效地从潮汐流发电。这种类型的动力装置与具有单个螺旋桨的常规装置相比具有几个优点。在潮流发电机组的设计中，研究桨尖涡管脱落的结构对预测螺旋桨的载荷具有重要意义。本文采用CFD方法研究了常规单桨和对转串列桨的桨尖涡脱落，并采用RANS（Reynolds Averaged Navier-Stokes）模型估算了桨尖涡的性能效率，证实了RANS模型在桨尖涡拉伸计算中的局限性。
Ocean energy has a potential of providing a large amount of renewable energy around the world. One of the forms of ocean energy, tidal stream power is widely recognized as the continuous, predictable and eco-friendly ocean energy source. Unique tandem propellers that can counter-rotate have been designed to generate electric power effectively from a tidal stream. This type of power unit has several advantages compare to the conventional unit with a single propeller. At the design of the tidal stream power unit, it is important to investigate the structure of the tip vortex tubes shedding to predict the load of the propeller. In this research, we investigated the tip vortex shedding using the CFD method for the conventional single propeller and counter-rotating type tandem propellers and estimated the performance efficiency using RANS (Reynolds Averaged Navier-Stokes) model and we confirmed the limitation of RANS model on the calculation of the tip vortex stretching.