【摘要】 Savonius叶轮是一种可以实现在管道中利用流体发电的机械，但传统的Savonius叶轮在工作时因其叶片边缘的形状容易造成流体能量损失并发出大量噪音，为了解决这一问题，本文提出了一种封闭式叶轮，将叶片边缘改变成完整的圆弧形来提高叶轮的能量转化率。通过数值仿真的方法验证了封闭式叶轮能够使流体更贴合叶轮流动，提高能量转化率，同时模拟了不同迎流面积与进口流速对封闭式叶轮的影响，结果表明：迎流面积和进口流速的增大都会增大封闭式叶轮的稳定转速，当进口流速超过5 m/s后，封闭式叶轮对流体能量的转化率会下降。更多还原

【Abstract】 A Savonius impeller is a mechanical device that can generate electricity from fluids in pipelines. However, traditional Savonius impellers can easily cause fluid energy loss and emit a lot of noise due to the shape of their blade edges during operation. To solve this problem, this paper proposes a closed impeller that changes the blade edges into a complete circular arc shape to improve the energy conversion rate of the impeller. The numerical simulation method was used to verify that a closed impeller can make the fluid flow more in line with the impeller flow and improve energy conversion rate. At the same time, the effects of different upstream areas and inlet flow rates on the closed impeller were simulated. The results showed that an increase in upstream areas and inlet flow rates would increase the stable speed of the closed impeller. When the inlet flow rate exceeded 5m/s, the conversion rate of fluid energy by the closed impeller would decrease.更多还原