TY - GEN
T1 - Improvement of partial load performance of francis turbine runner
AU - Yamaguchi, Naoki
AU - Tanaka, Tadachika
AU - Miyagawa, Kazuyoshi
PY - 2014
Y1 - 2014
N2 - Turbine operation range has had to be extended to meet economic requirements in recent years. Specifically, efficiency under partial flow conditions has been improved by the development of low loss runners. The most effective runner design achieves suitable flow distribution from the runner exit, because the loss mechanism in the partial flow is due to swirl loss in the draft tube. In this study, a new design concept for improving turbine efficiency under low flow rate conditions is established and confirmed by both computation and experiment. The performance predicted by the CFD is compared with the experimental results and good agreement is observed. This report describes some runner shape improvement techniques to mitigate the effects of the flow conditions in a partial flow scenario, and validates their results through model performance testing.
AB - Turbine operation range has had to be extended to meet economic requirements in recent years. Specifically, efficiency under partial flow conditions has been improved by the development of low loss runners. The most effective runner design achieves suitable flow distribution from the runner exit, because the loss mechanism in the partial flow is due to swirl loss in the draft tube. In this study, a new design concept for improving turbine efficiency under low flow rate conditions is established and confirmed by both computation and experiment. The performance predicted by the CFD is compared with the experimental results and good agreement is observed. This report describes some runner shape improvement techniques to mitigate the effects of the flow conditions in a partial flow scenario, and validates their results through model performance testing.
KW - CFD
KW - Design method
KW - Francis turbine
KW - Model performance test
KW - Partial load
UR - http://www.scopus.com/inward/record.url?scp=84937156381&partnerID=8YFLogxK
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U2 - 10.1049/cp.2014.1138
DO - 10.1049/cp.2014.1138
M3 - Conference contribution
AN - SCOPUS:84937156381
SN - 9781849199070
T3 - IET Conference Publications
BT - 2014 ISFMFE - 6th International Symposium on Fluid Machinery and Fluid Engineering
PB - Institution of Engineering and Technology
T2 - 6th International Symposium on Fluid Machinery and Fluid Engineering, ISFMFE 2014
Y2 - 22 October 2014 through 25 October 2014
ER -