Abstract
Conventional hydraulic power generation has been operated by large-scale equipment used from high to medium head. However, installation sites having adequate head are decreasing. Moreover, large-scale equipment has great influence on environment. Therefore, it is thought that the generation of electrical energy by an ultra-small axial flow hydraulic turbine of the portable type which utilized low head of an existing pipeline or an open channel becomes promising. However, since the ultra-small axial flow hydraulic turbine has the low Reynolds number, the design method has not been established. In this study, as the first step towards establishment of the design method of an ultra-small axial flow hydraulic turbine, the ultra-small axial flow hydraulic turbine was designed based on the design method of the conventional axial flow hydraulic turbine, and the performance and internal flow were clarified by the numerical analysis.
