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Comprehensive influence of dimensionless wave velocity and expansion ratio on energy absorption characteristics of variable wavelength traveling wave turbine

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  • Cui, Zhifei
  • Ruan, PengCheng
  • Bai, Yang
  • Huang, Diangui

Abstract

Based on the traveling wave motion of fish, this paper introduces a new type of variable wavelength traveling wave turbine that significantly differs from traditional turbine designs in its mechanical structure. By developing a two-dimensional traveling wavy plate model and conducting numerical simulations, this study investigates the relationship between the dimensionless wave velocity, variable wavelength coefficient, and expansion ratio, as well as their combined effects on the energy absorption characteristics of the variable wavelength traveling wave turbine. The results reveal that energy absorption efficiency peaks at an optimal dimensionless wave velocity, which is unaffected by changes in the variable wavelength coefficient. Furthermore, the expansion ratio significantly influences both the dimensionless wave velocity and the variable wavelength coefficient, with an optimal ratio of π∗ = 2.5 achieving 90.42 % efficiency. The energy absorption characteristics of the plate with a larger variable wavelength coefficient are found to be constrained by the expansion ratio. Additional analysis reveals that flow characteristics, such as the pressure distribution, vortex street, and velocity field surrounding the traveling wavy plate, are closely related to its energy absorption performance. These findings provide valuable insights for the design of variable wavelength traveling wave turbine.

Suggested Citation

  • Cui, Zhifei & Ruan, PengCheng & Bai, Yang & Huang, Diangui, 2024. "Comprehensive influence of dimensionless wave velocity and expansion ratio on energy absorption characteristics of variable wavelength traveling wave turbine," Renewable Energy, Elsevier, vol. 237(PB).
    • Handle: RePEc:eee:renene:v:237:y:2024:i:pb:s0960148124017786
    DOI: 10.1016/j.renene.2024.121710
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    References listed on IDEAS

    as
    1. Zhu, Qianming & Ma, Qiyu & Qi, Yinke & Huang, Diangui, 2022. "Traveling wave turbine - An internal flow energy absorption mode based on the traveling wave motion," Renewable Energy, Elsevier, vol. 195(C), pages 137-146.
    2. Ruan, Pengcheng & Huang, Diangui, 2023. "Study of aerodynamic performance of built-in variable wavelength traveling wave turbine," Renewable Energy, Elsevier, vol. 205(C), pages 918-928.
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