Study on high pressure design of contra-rotating small hydroturbine

[摘要] It is requested that the hydroturbine is small size and high performance. Therefore, we adopted contra-rotating rotors, which can be expected to achieve small size and high performance. However, when the rotors become smaller, the output power of conventional contra-rotating rotors, which is composed of axial flow rotors, is very low. In order to achieve small size and high output power, we propose new type contra-rotating rotors, which is composed of a hybrid rotor and a centrifugal rotor. In this research, we investigate performance of the new type contra-rotating small hydroturbine model by the numerical analysis. We report on the influence of deflection angle on the performance and internal flow condition.

[发布机构] Graduate School of Advanced Technology and Science, Tokushima University, 2-1 Minamijyosanjima-cho, Tokushima; 770-8506, Japan^1;Graduate School of Technology, Industrial and Social Sciences, Tokushima University, 2-1 Minamijyosanjima-cho, Tokushima; 770-8506, Japan^2

[关键词] Axial flow rotor;Contra-rotating;Contrarotating rotor;Deflection angles;High output power;High-pressure design;Hydroturbines;Internal flow condition