TY - JOUR
T1 - Experimental study on adjustment of inlet nozzle section to flow rate variation for darrieus-type hydro-turbine
AU - Watanabe, Satoshi
AU - Shimokawa, Kai
AU - Furukawa, Akinori
AU - Okuma, Kusuo
AU - Matsushita, Daisuke
PY - 2012/3
Y1 - 2012/3
N2 - A two dimensional Darrieus-type turbine has been proposed for the hydropower utilization of extra-low head less than 2m. In a practical use of Darrieus-type hydro-turbine, head and flow rate may be varied temporally and seasonally. Considering that the cost advantage is required for the low head hydro turbine system, the Darrieus turbine should be operated with high efficiency in the wider range of flow rate possibly by using an additional device with simpler mechanism. In the present paper, an adjustment of inlet nozzle section by lowering the inlet nozzle height is proposed to obtain the preferable inlet velocity in low flow rate conditions. Effects of resulting spanwise partial inlet flow are investigated. Finally, an effective modification of inlet nozzle height over flow rate variation is shown.
AB - A two dimensional Darrieus-type turbine has been proposed for the hydropower utilization of extra-low head less than 2m. In a practical use of Darrieus-type hydro-turbine, head and flow rate may be varied temporally and seasonally. Considering that the cost advantage is required for the low head hydro turbine system, the Darrieus turbine should be operated with high efficiency in the wider range of flow rate possibly by using an additional device with simpler mechanism. In the present paper, an adjustment of inlet nozzle section by lowering the inlet nozzle height is proposed to obtain the preferable inlet velocity in low flow rate conditions. Effects of resulting spanwise partial inlet flow are investigated. Finally, an effective modification of inlet nozzle height over flow rate variation is shown.
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U2 - 10.5293/IJFMS.2012.5.1.030
DO - 10.5293/IJFMS.2012.5.1.030
M3 - Article
AN - SCOPUS:84863809757
SN - 1882-9554
VL - 5
SP - 30
EP - 37
JO - International Journal of Fluid Machinery and Systems
JF - International Journal of Fluid Machinery and Systems
IS - 1
ER -