Optimization and Flow Analysis of Ducted Tidal Stream Turbine

Jun Wei Zhou; Da Zheng Wang; Ya Nan Li

doi:10.4028/www.scientific.net/AMR.694-697.683

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HomeAdvanced Materials ResearchAdvanced Materials Research Vols. 694-697Optimization and Flow Analysis of Ducted Tidal...

Optimization and Flow Analysis of Ducted Tidal Stream Turbine

Abstract:

Efficiency of the tidal stream turbine with thin-wall axisymmetric ducts was numerically simulated. The ducts design parameters of diffuser curves, expansion ratio and duct length were simply optimized. The results showed that the duct of second order diffuser curve, expansion ratio of 2.25 and a length-diameter ratio of 1.2 has the best performance. By comparison of different ducts flow, it revealed that flow separation at the duct outlet and the ejection influenced ducted turbine efficiency. The separation caused blockage and flow rate decreasing, and so performance deteriorated. The ejection caused lower pressure at the outlet of the duct, which allowed higher pressure drop through turbine impeller, and so improved turbine efficiency.

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Periodical:

Advanced Materials Research (Volumes 694-697)

Pages:

683-688

DOI:

https://doi.org/10.4028/www.scientific.net/AMR.694-697.683

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Online since:

May 2013

Authors:

Jun Wei Zhou, Da Zheng Wang, Ya Nan Li

Keywords:

Ducted Turbine, Flow Analysis, Numerical Simulation, Parameter Optimization

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