Host: The Japan Society of Mechanical Engineers
Name : [in Japanese]
Date : September 11, 2022 - September 14, 2022
This study focused on impulse turbines that generate hydraulic power using excess pressure from the water supply. For hydropower generation in water supply systems, it is necessary to operate the turbine submerged in water for sanitary reasons. However, impulse turbines are generally designed to operate in the air. We have developed an impulse turbine suitable for submerged operation. In previous research, we have studied runner shapes suitable for submerged operation and methods to reduce lost torque. The shape of the nozzles used to supply the jet stream has also been studied. The authors aimed to evaluate the effect of the number of nozzles on the turbine performance of a submerged operating impulse turbine. The results show that the maximum efficiency increased with the number, and the operating speed range widened. Increasing the number of nozzles enhances the turbine performance due to increased input energy against power loss and the change of relative velocity angle. Increasing the number of nozzles enhances the turbine performance due to increased input energy against power loss and the change of relative velocity angle.
