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Title: Modelling a Heaving Point-Absorber with a Closed-Loop Control System Using the DualSPHysics Code

Journal Article · · Energies (Basel)
DOI:https://doi.org/10.3390/en14030760· OSTI ID:1765745
 [1];  [1];  [2];  [3];  [4];  [5];  [4]
  1. Univ. di Vigo, Ourense (Spain). Environmental Physics Lab. (EPhysLab)
  2. Sandia National Lab. (SNL-CA), Livermore, CA (United States)
  3. Univ. degli Studi di Salerno, Fisciano (Italy)
  4. Univ. de Vigo, Ourense (Spain). Environmental Physics Lab. (EPhysLab)
  5. Sandia National Lab. (SNL-NM), Albuquerque, NM (United States)

The present work addresses the need for an efficient, versatile, accurate and open-source numerical tool to be used during the design stage of wave energy converters (WECs). The device considered here is the heaving point-absorber developed and tested by Sandia National Laboratories. The smoothed particle hydrodynamics (SPH) method, as implemented in DualSPHysics, is proposed since its meshless approach presents some important advantages when simulating floating devices. The dynamics of the power take-off system are also modelled by coupling DualSPHysics with the multi-physics library Project Chrono. A satisfactory matching between experimental and numerical results is obtained for: (i) the heave response of the device when forced via its actuator; (ii) the vertical forces acting on the fixed device under regular waves and; (iii) the heave response of the WEC under the action of both regular waves and the actuator force. This proves the ability of the numerical approach proposed to simulate accurately the fluid–structure interaction along with the WEC’s closed-loop control system. In addition, radiation models built from the experimental and WAMIT results are compared with DualSPHysics by plotting the intrinsic impedance in the frequency domain, showing that the SPH method can be also employed for system identification.

Research Organization:
Sandia National Lab. (SNL-NM), Albuquerque, NM (United States)
Sponsoring Organization:
USDOE Office of Energy Efficiency and Renewable Energy (EERE), Wind and Hydropower Technology Program; USDOE National Nuclear Security Administration (NNSA)
Grant/Contract Number:
AC04-94AL85000; NA0003525
OSTI ID:
1765745
Report Number(s):
SAND-2021-1017J; 693698
Journal Information:
Energies (Basel), Vol. 14, Issue 3; ISSN 1996-1073
Publisher:
MDPI AGCopyright Statement
Country of Publication:
United States
Language:
English

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