潮流能发电增速导流罩研究

Study on an accelerated diffuser of tidal current power generation

为提高潮流能水轮机的发电功率同时延长一个潮流周期内的可发电时间,采用数值计算(CFD)方法对一种新型水平轴水轮机增速导流罩的主要参数进行理论研究,并通过水池模型试验对计算结果进行验证.研究结果表明:增速导流罩可降低水轮机的启动流速,同时可以使水轮机发电功率得到显著提高,从而增加发电量.潮流能发电增速导流装置的研究将对弥补能源短缺,缓解环境污染起到重要作用.

In order to prolong the working time of turbines during one cycle of tidal current,and obtain more power of generation for a turbine which generates power by making use of tidal current energy,a new kind of accelerated diffuser for a horizontal tidal current turbine was designed.The computational fluid dynamics（CFD） method was used to calculate performance of this diffuser,and an experiment was carried out to validate simulation results.A comparison between simulation results and experimental results shows that the accelerated diffuser can reduce the self-starting speed of the turbine and significantly increase the power obtained.The research on a accelerated diffuser of tidal current power generation provides a way to compensate for energy shortage.It is also significant for cutting back on environmental pollution.