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虽然传统的垂直轴萨沃纽斯（Savonius）转子具有结构简单、自启动性能好等优点，但是其能量转换效率较低，因而其作为风能、水流能转换装置的使用并不广泛。如何提高Savonius转子的性能是目前国内外新能源研究领域一个十分引人关注的课题。大量的研究表明，两个并列旋转的Savonius转子间存在着一定的耦合作用，这种作用有助于提高单个转子的做功效率。在此基础上，本文提出了一种具用双Savonius转子，在外侧带有聚能一遮蔽板结构的新型水流能转换装置，并对这种装置的模型进行了水槽试验。试验结果表明：这种结构中的Savonius转子的性能可比单个传统的Savonius转子最大提高38％。此外，试验中还对两转子间的距离、聚能一遮蔽板与来流方向的夹角对提高Savonius转子性能的影响进行了研究。

A conventional Savonius rotor has many advantages over others in that its constructions are simpler and cheaper; it is independent of the fluid direction and has a good starting torque at lower wind or water speeds. However, Savonius rotors are not commonly used as wind turbines or water current power generating devices because of its relatively low energy conversion efficiency. Thus, how to improve the performance of Savonius rotor is a hot research topic attracting a growing attention in the field of renewable energy utilization. Previous research suggests that a mutual coupling effect exists between two Savonius rotors when rotating side by side and this effect can increase both rotors' power output. Therefore, based on this fact, a new water current power generating device composed of two Savonius rotors and collect-shield plates is designed in this paper. A model of this device was constructed and tested in a water tank. Experimental results showed that with such a structure, the power output of each Savonius rotor can be increased by as much as 38%. In addition, the influences of the lateral distance between two Savonius rotors and the angle of collect-shield plate relative to the incoming flow on this efficiency improvement in Savonius rotor were also studied in the present experiments.