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Numerical simulation of the loading characteristics of straight and helical-bladed vertical axis tidal turbines

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  • Marsh, Philip
  • Ranmuthugala, Dev
  • Penesis, Irene
  • Thomas, Giles

Abstract

The stress and deflection of straight and helical-bladed vertical axis turbines was investigated using hydrodynamic and structural analysis models. Using Double Multiple Streamtube (DMS) and Computational Fluid Dynamics (CFD) models, the hydrodynamic forces and pressures on the turbines were modelled for three rotational rates from startup to over speed conditions. The results from these hydrodynamic models were then used to determine stress and total deflection levels using beam theory and Finite Element Analysis (FEA) methods. Maximum stress and deflection levels were found when the blades were in the furthest upstream region, with the highest stresses found at the blade-strut joints for the turbines studied. The helical turbine exhibited on average 13% lower maximum stress levels than the straight-bladed turbine, due to the helical distribution of the blades around the rotational axis. All simulation models offered similar accuracy when predicting maximum blade stress and deflection levels; however for detailed analysis of the blade-strut joints the more computationally demanding CFD-FEA models were required. Straight-bladed, rather than helical turbines, are suggested to be more suited for tidal installations, as for the same turbine frontal area they produce higher power output with only 13% greater structural stress loading.

Suggested Citation

  • Marsh, Philip & Ranmuthugala, Dev & Penesis, Irene & Thomas, Giles, 2016. "Numerical simulation of the loading characteristics of straight and helical-bladed vertical axis tidal turbines," Renewable Energy, Elsevier, vol. 94(C), pages 418-428.
    • Handle: RePEc:eee:renene:v:94:y:2016:i:c:p:418-428
    DOI: 10.1016/j.renene.2016.03.060
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    References listed on IDEAS

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    1. Malipeddi, A.R. & Chatterjee, D., 2012. "Influence of duct geometry on the performance of Darrieus hydroturbine," Renewable Energy, Elsevier, vol. 43(C), pages 292-300.
    2. Marsh, Philip & Ranmuthugala, Dev & Penesis, Irene & Thomas, Giles, 2015. "Numerical investigation of the influence of blade helicity on the performance characteristics of vertical axis tidal turbines," Renewable Energy, Elsevier, vol. 81(C), pages 926-935.
    3. Marsh, Philip & Ranmuthugala, Dev & Penesis, Irene & Thomas, Giles, 2015. "Three-dimensional numerical simulations of straight-bladed vertical axis tidal turbines investigating power output, torque ripple and mounting forces," Renewable Energy, Elsevier, vol. 83(C), pages 67-77.
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    Cited by:

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    2. Runqiang Zhang & Zhenwei Huang & Lei Tan & Yuchuan Wang & Erqi Wang, 2020. "Energy Performance and Radial Force of Vertical Axis Darrieus Turbine for Ocean Energy," Energies, MDPI, vol. 13(20), pages 1-15, October.
    3. Marsh, Philip & Ranmuthugala, Dev & Penesis, Irene & Thomas, Giles, 2017. "The influence of turbulence model and two and three-dimensional domain selection on the simulated performance characteristics of vertical axis tidal turbines," Renewable Energy, Elsevier, vol. 105(C), pages 106-116.
    4. Peng, H.Y. & Liu, H.J. & Yang, J.H., 2021. "A review on the wake aerodynamics of H-rotor vertical axis wind turbines," Energy, Elsevier, vol. 232(C).
    5. Zhang, Aiming & Liu, Sen & Ma, Yong & Hu, Chao & Li, Zhengyu, 2022. "Field tests on model efficiency of twin vertical axis helical hydrokinetic turbines," Energy, Elsevier, vol. 247(C).
    6. Marinić-Kragić, Ivo & Vučina, Damir & Milas, Zoran, 2018. "Numerical workflow for 3D shape optimization and synthesis of vertical-axis wind turbines for specified operating regimes," Renewable Energy, Elsevier, vol. 115(C), pages 113-127.
    7. Tunio, Intizar Ali & Shah, Madad Ali & Hussain, Tanweer & Harijan, Khanji & Mirjat, Nayyar Hussain & Memon, Abdul Hameed, 2020. "Investigation of duct augmented system effect on the overall performance of straight blade Darrieus hydrokinetic turbine," Renewable Energy, Elsevier, vol. 153(C), pages 143-154.

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