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Computed effects of tip clearance on performance of impulse turbine for wave energy conversion

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  • Thakker, A.
  • Dhanasekaran, T.S.

Abstract

This paper depicts numerical analysis on Impulse turbine with fixed guide vanes for wave energy conversion. From the previous investigations, it is found that one of the reasons for the mismatch between computed and experimental data is due to neglecting tip clearance ef fect. Hence, a 3-D model with tip clearance has been generated to predict the internal flow and performance of the turbine. As a result, it is found that the comparison between computed and experimental data is good, quantitatively and qualitatively. Computation has been carried out for various tip clearances to understand the physics of tip leakage flow and effect of tip clearance on performance of such unconventional turbine. It is predicted that the turbine with 0.25% tip clearance performs almost similar to the case of without tip clearance for the entire flow coefficients. The designed value of 1% tip clearance has been validated numerically and computed that the efficiency of the turbine has been reduced around 4%, due to tip clearance flow at higher flow coefficients.

Suggested Citation

  • Thakker, A. & Dhanasekaran, T.S., 2004. "Computed effects of tip clearance on performance of impulse turbine for wave energy conversion," Renewable Energy, Elsevier, vol. 29(4), pages 529-547.
    • Handle: RePEc:eee:renene:v:29:y:2004:i:4:p:529-547
    DOI: 10.1016/j.renene.2003.09.007
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    References listed on IDEAS

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    1. Kim, T.H. & Setoguchi, T. & Kaneko, K. & Raghunathan, S., 2002. "Numerical investigation on the effect of blade sweep on the performance of Wells turbine," Renewable Energy, Elsevier, vol. 25(2), pages 235-248.
    2. Maeda, H & Santhakumar, S & Setoguchi, T & Takao, M & Kinoue, Y & Kaneko, K, 1999. "Performance of an impulse turbine with fixed guide vanesfn2fn2Patent pending. for wave power conversion," Renewable Energy, Elsevier, vol. 17(4), pages 533-547.
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    Cited by:

    1. Hao, Yue & Tan, Lei, 2018. "Symmetrical and unsymmetrical tip clearances on cavitation performance and radial force of a mixed flow pump as turbine at pump mode," Renewable Energy, Elsevier, vol. 127(C), pages 368-376.
    2. Liu, Yabin & Tan, Lei, 2020. "Influence of C groove on suppressing vortex and cavitation for a NACA0009 hydrofoil with tip clearance in tidal energy," Renewable Energy, Elsevier, vol. 148(C), pages 907-922.
    3. Liu, Yabin & Han, Yadong & Tan, Lei & Wang, Yuming, 2020. "Blade rotation angle on energy performance and tip leakage vortex in a mixed flow pump as turbine at pump mode," Energy, Elsevier, vol. 206(C).
    4. García-Díaz, Manuel & Pereiras, Bruno & Miguel-González, Celia & Rodríguez, Laudino & Fernández-Oro, Jesús, 2021. "Design of a new turbine for OWC wave energy converters: The DDT concept," Renewable Energy, Elsevier, vol. 169(C), pages 404-413.
    5. Badhurshah, Rameez & Samad, Abdus, 2015. "Multiple surrogate based optimization of a bidirectional impulse turbine for wave energy conversion," Renewable Energy, Elsevier, vol. 74(C), pages 749-760.
    6. Yongyao Luo & Alexandre Presas & Zhengwei Wang, 2019. "Numerical Analysis of the Influence of Design Parameters on the Efficiency of an OWC Axial Impulse Turbine for Wave Energy Conversion," Energies, MDPI, vol. 12(5), pages 1-12, March.
    7. Liu, Yabin & Tan, Lei, 2018. "Tip clearance on pressure fluctuation intensity and vortex characteristic of a mixed flow pump as turbine at pump mode," Renewable Energy, Elsevier, vol. 129(PA), pages 606-615.
    8. Manuel García-Díaz & Bruno Pereiras & Celia Miguel-González & Laudino Rodríguez & Jesús Fernández-Oro, 2021. "CFD Analysis of the Performance of a Double Decker Turbine for Wave Energy Conversion," Energies, MDPI, vol. 14(4), pages 1-19, February.
    9. Liu, Yabin & Tan, Lei, 2018. "Method of C groove on vortex suppression and energy performance improvement for a NACA0009 hydrofoil with tip clearance in tidal energy," Energy, Elsevier, vol. 155(C), pages 448-461.
    10. Liu, Yabin & Tan, Lei, 2020. "Method of T shape tip on energy improvement of a hydrofoil with tip clearance in tidal energy," Renewable Energy, Elsevier, vol. 149(C), pages 42-54.
    11. Yabin Liu & Lei Tan & Binbin Wang, 2018. "A Review of Tip Clearance in Propeller, Pump and Turbine," Energies, MDPI, vol. 11(9), pages 1-30, August.
    12. Han, Yadong & Tan, Lei, 2020. "Dynamic mode decomposition and reconstruction of tip leakage vortex in a mixed flow pump as turbine at pump mode," Renewable Energy, Elsevier, vol. 155(C), pages 725-734.

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