TY - JOUR
T1 - Side-wall effect of runner casing on performance of Darrieus-type hydro turbine with inlet nozzle for extra-low head utilization
AU - Shimokawa, Kai
AU - Furukawa, Akinori
AU - Okuma, Kusuo
AU - Matsushita, Daisuke
AU - Watanabe, Satoshi
PY - 2010/1
Y1 - 2010/1
N2 - A ducted Darrieus-type turbine has been proposed for hydropower utilization of extra-low head less than 2 m. Though the hydro turbine system, in general, might consist of an intake, runner casing section and a draft tube for higher efficiency operation, it was clarified in previous experiment that there was no need of the side-walls of runner casing section and a draft-tube for keeping the efficiency high in the case of duct with an inlet nozzle. This would yield a simplification of the structure of the turbine system. In order to reconfirm this result for large-sized turbine with 560 mm×300 mm duct, instead of small-sized one with 400 mm×200 mm duct, the side-wall effect on turbine performance was experimentally investigated for three- or four-bladed runner. In the present paper, the experimental results are shown with considering flow behaviors in the runner section.
AB - A ducted Darrieus-type turbine has been proposed for hydropower utilization of extra-low head less than 2 m. Though the hydro turbine system, in general, might consist of an intake, runner casing section and a draft tube for higher efficiency operation, it was clarified in previous experiment that there was no need of the side-walls of runner casing section and a draft-tube for keeping the efficiency high in the case of duct with an inlet nozzle. This would yield a simplification of the structure of the turbine system. In order to reconfirm this result for large-sized turbine with 560 mm×300 mm duct, instead of small-sized one with 400 mm×200 mm duct, the side-wall effect on turbine performance was experimentally investigated for three- or four-bladed runner. In the present paper, the experimental results are shown with considering flow behaviors in the runner section.
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U2 - 10.1007/s11431-010-0014-7
DO - 10.1007/s11431-010-0014-7
M3 - Article
AN - SCOPUS:77950799024
SN - 1674-7321
VL - 53
SP - 93
EP - 99
JO - Science China Technological Sciences
JF - Science China Technological Sciences
IS - 1
ER -