The use of deflectors as augmentation devices to improve the power performance of a 3-bladed conventional Savonius turbine has been investigated by analyzing the deflectors’ effects on self-starting capability and power performance at various deflector angles. Two deflector plates positioned at the upstream of the turbine were tested inside a closed-circuit wind tunnel at an air flow speed of 7.0 m/s (equivalent to 0.4 m/s water flow speed). The self-starting capability of the turbine was characterized in terms of the coefficient of static torque, C_TS at various advancing blade deflector angles and returning blade deflector angles of δ_A $=$ 15°, 30°, 45°, 60° and 75°and δ_R $=$ 30°, 60°, 90°, respectively. It was found that the C_TS profiles were generally higher than without any deflector. The increment of δ_R showed that it had a significant effect on the C_TS profile due to the reduction of drag force on the returning blade as compared to the variation of δ_A. The study highlighted that the C_TS profiles shifted away from the no-self-start conditions (C_TS $<$ 0) with the presence of deflectors. The experimental results also revealed that the coefficient of power, C_P significantly improved for the case with the deflectors, particularly at δ_R $=$90°. The highest C_P of 0.183 was achieved at δ_A $=$ 75° and δ_R $=$ 90°, which was also the optimal deflector configuration for the best self-starting characteristics. Thus, deflector augmentation may be a practical solution to improve the power performance and self-starting capability of the Savonius turbine in hydrokinetic applications, particularly at the low speeds of narrow and shallower rivers commonly found in rural areas.

通过分析偏转器在各种偏转器角度下对自启动能力和功率性能的影响，研究了使用偏转器作为增强装置来改善三叶片常规Savonius涡轮机的动力性能。在闭路风洞内以7.0 m / s的空气流速（相当于0.4 m / s的水流速）对位于涡轮机上游的两个导流板进行了测试。涡轮的自启动能力通过静转矩系数，在各种前进叶片偏转角和返回叶片偏转角δA时_的C _TS来表征 $=$15°，30°，45°，60°和75°和δ _ř $=$分别为30°，60°，90°。已经发现，C _TS曲线通常比没有偏转器的情况要高。的增量δ _[R表明其对一个显著效果ç _TS轮廓由于对返回叶片曳力的减小相比的变化δ_甲。该研究强调，C _TS轮廓偏离了非自启动条件（C _TS $<$0）存在偏转器。实验结果还表明，功率系数，Ç _P显著用于与所述偏转器的情况下得到改善，特别是在δ _ř $=$90°。最高ç _P 0.183在实现δ_一个 $=$75°和δ _ř $=$90°，这也是具有最佳自启动特性的最佳导流板配置。因此，增加导流板可能是在流体动力学应用中提高Savonius涡轮机的动力性能和自启动能力的实用解决方案，特别是在农村地区常见的狭窄和较浅的河流低速行驶时。