Abstract

The aim of this study is to develop an ultralow-head water turbine for an open channel, such as an irrigation channel, in order to effectively use hitherto unused hydropower energies. By focusing on a cross-flow runner, we eliminated the casing and used the application as a water turbine undershot-type cross-flow water turbine) for an open channel. We investigated the performance and internal flow of the water turbine with straight blades through an experiment and numerical analysis. As a result, the following facts became clear. At the turbine with straight blades, water area is narrowed at the outer and inner circumference of the runner, and torque and power are bigger.

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