International Journal of Fluid Machinery and Systems

Korean Society for Fluid machinery (한국유체기계학회)
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Experimental Study on Adjustment of Inlet Nozzle Section to Flow Rate Variation for Darrieus-type Hydro-Turbine

  • Received : 2012.02.13
  • Accepted : 2012.03.12
  • Published : 2012.03.31
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Abstract

A two dimensional Darrieus-type turbine has been proposed for the hydropower utilization of extra-low head less than 2m. In a practical use of Darrieus-type hydro-turbine, head and flow rate may be varied temporally and seasonally. Considering that the cost advantage is required for the low head hydro turbine system, the Darrieus turbine should be operated with high efficiency in the wider range of flow rate possibly by using an additional device with simpler mechanism. In the present paper, an adjustment of inlet nozzle section by lowering the inlet nozzle height is proposed to obtain the preferable inlet velocity in low flow rate conditions. Effects of resulting spanwise partial inlet flow are investigated. Finally, an effective modification of inlet nozzle height over flow rate variation is shown.

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References

  1. Furukawa A., Watanabe S., Matsushita D. and Okuma K., 2010, "Development of Ducted Darrieus Turbine for Low-Head Hydropower Utilization," Current Applied Physics, Vol. 10, Supplement 2, pp. S128-S132. https://doi.org/10.1016/j.cap.2009.11.005
  2. Matsushita D., Okuma K., Watanabe S. and Furukawa A., 2008, "Simplified Structure of Ducted Darrieus-type Hydro Turbine with Narrow Intake for Extra-low Head Hydropower Utilization," J. of Fluids Science and Technology, Vol. 3, No 3, pp. 387-397. https://doi.org/10.1299/jfst.3.387
  3. Shimokawa K., Furukawa A., Okuma K., Matsushita D. and Watanabe S., 2010, "Experimental Study on Simplification of Darrieus-type Hydro Turbine with Inlet Nozzle for Extra-low Head Hydropower Utilization," Proceedings of the Int'l Symposium on Low Carbon & Renewable Energy Technology, Jeju, Korea, pp. 163.
  4. Furukawa A., Takenouchi K., Okuma K. and Watanabe S., "Utilization of Two-Dimensional Ducted Darrieus Turbine for Extra-low Head Hydropower," Proceedings of Expo World Conf. on Wind Energy, Renewable Energy, Fuel Cell & Exhibition 2005, Hamamatsu, Japan, 4010, pp. 1-4.
  5. Takamatsu Y., Furukawa A., Okuma K., Takenouchi K., Sasaki T. and Cho K., 1992, "Studies on Cavitation Occurring on the Runner Blade of a Darrieus-Type Cross-Flow Water Turbine," Japan Soc. Mech. Engrs. Inter. J., Ser. II, Vol. 35, No. 1 pp. 46-52.