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http://dx.doi.org/10.5293/KFMA.2008.11.4.045

Effect of Nozzle Shape on the Performance and Internal Flow of a Cross-Flow Hydro Turbine  

Choi, Young-Do (한국해양대학교 산학협력단)
Lim, Jae-Ik (한국해양대학교 대학원)
Kim, You-Taek (한국해양대학교 기관시스템공학부)
Lee, Young-Ho (한국해양대학교 기계.정보공학부)
Publication Information
The KSFM Journal of Fluid Machinery / v.11, no.4, 2008 , pp. 45-51 More about this Journal
Abstract
The purpose of this study is to examine the effect of nozzle shape on the performance and internal flow of a cross-flow hydro turbine. CFD analysis for three kinds of nozzle shape is conducted to simulate the effect of nozzle shape. The results reveal that relatively narrow nozzle width is effective to increase the turbine efficiency and output power. Almost output power is achieved at Stage 1. Therefore, optimum design of the nozzle shape is necessary to improve the turbine performance. Recirculation flow in the runner passage decreases the turbine efficiency and output power because the flow make hydraulic loss and collision loss in the region. Air should be put into the runner passage and the recirculating flow should be suppressed by the air layer in the runner.
Keywords
Cross-flow hydro turbine; Small hydropower; Nozzle shape; Performance; Internal flow;
Citations & Related Records
Times Cited By KSCI : 1  (Citation Analysis)
연도 인용수 순위
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