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A cost-effective CNN-BEM coupling framework for design optimization of horizontal axis tidal turbine blades

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Listed:
  • Xu, Jian
  • Wang, Longyan
  • Yuan, Jianping
  • Shi, Jiali
  • Wang, Zilu
  • Zhang, Bowen
  • Luo, Zhaohui
  • Tan, Andy C.C.

Abstract

The paper proposes a novel cost-effective framework that combines deep learning convolutional neural network (CNN) and blade element momentum (BEM) models for optimizing the performance of three-dimensional (3D) horizontal axis tidal turbines (HATTs). The framework employs signed distance function (SDF) to reconstruct the three-dimensional blade geometry, utilizes CNN to identify the hydrodynamic performance of each blade section, and ultimately predicts the performance of HATT using BEM. On top of the new CNN-BEM model, the rotor blade geometrical optimization by multi-objective non-dominated sorting genetic algorithm (NSGA-II) is carried out to obtain a better trade-off solution with the maximal power coefficient of turbine and minimal hydrodynamic load exerted on the blades. The results show that the CNN-BEM model has good agreement with experimental data and reduces prediction time by 46.7% compared to the conventional Xfoil-BEM model, while reducing general optimization time by 20.1%. The new model's cost-efficiency allows for a better trade-off solution with reduced hydrodynamic load while maintaining the power coefficient. Thus, the proposed model has the capability to deliver both accurate and fast prediction and optimization of HATT performance, making it a valuable tool for guiding the design of tidal turbines.

Suggested Citation

  • Xu, Jian & Wang, Longyan & Yuan, Jianping & Shi, Jiali & Wang, Zilu & Zhang, Bowen & Luo, Zhaohui & Tan, Andy C.C., 2023. "A cost-effective CNN-BEM coupling framework for design optimization of horizontal axis tidal turbine blades," Energy, Elsevier, vol. 282(C).
    • Handle: RePEc:eee:energy:v:282:y:2023:i:c:s0360544223021011
    DOI: 10.1016/j.energy.2023.128707
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    References listed on IDEAS

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