Study on high pressure design of contra-rotating small hydroturbine

29th IAHR Symposium on Hydraulic Machinery and Systems

Hosotani, Takuji^1 ; Shigemitsu, Toru^2 ; Kawaguchi, Yuki^1 ; Ikebuchi, Tomofumi^1

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;   

Others  :  https://iopscience.iop.org/article/10.1088/1755-1315/240/4/042013/pdf
DOI  :  10.1088/1755-1315/240/4/042013

来源: IOP

【 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.