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http://dx.doi.org/10.5293/IJFMS.2014.7.4.174

The Flow Field of Undershot Cross-Flow Water Turbines Based on PIV Measurements and Numerical Analysis  

Nishi, Yasuyuki (Department of Mechanical Engineering, Ibaraki University)
Inagaki, Terumi (Department of Mechanical Engineering, Ibaraki University)
Li, Yanrong (Department of Mechanical Engineering, Ibaraki University)
Omiya, Ryota (Graduate School of Science and Engineering, Ibaraki University)
Hatano, Kentaro (Graduate School of Science and Engineering, Ibaraki University)
Publication Information
International Journal of Fluid Machinery and Systems / v.7, no.4, 2014 , pp. 174-182 More about this Journal
Abstract
The ultimate objective of this study is to develop a water turbine appropriate for low-head open channels to effectively utilize the unused hydropower energy of rivers and agricultural waterways. The application of a cross-flow runner to open channels as an undershot water turbine has been considered and, to this end, a significant simplification was attained by removing the turbine casing. However, the flow field of an undershot cross-flow water turbine possesses free surfaces, and, as a result, the water depth around the runner changes with variation in the rotational speed such that the flow field itself is significantly altered. Thus, clear understanding of the flow fields observed with free surfaces to improve the performance of this turbine is necessary. In this study, the performance of this turbine and the flow field were evaluated through experiments and numerical analysis. The particle image velocimetry technique was used for flow measurements. The experimental results reflecting the performance of this turbine and the flow field were consistent with numerical analysis. In addition, the flow fields at the inlet and outlet regions at the first and second stages of this water turbine were clarified.
Keywords
Water Turbine; Cross-Flow Turbine; Open Channel; Free Surface; Particle Image Velocimetry; Numerical Analysis;
Citations & Related Records
Times Cited By KSCI : 3  (Citation Analysis)
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