International Journal of Naval Architecture and Ocean Engineering

The Society of Naval Architects of Korea (대한조선학회)
권호 표지
DOI QR코드

DOI QR Code

Fully nonlinear time-domain simulation of a backward bent duct buoy floating wave energy converter using an acceleration potential method

  • Published : 2013.12.31
Download PDF
⟨ Previous Next ⟩

Abstract

A floating Oscillating Water Column (OWC) wave energy converter, a Backward Bent Duct Buoy (BBDB), was simulated using a state-of-the-art, two-dimensional, fully-nonlinear Numerical Wave Tank (NWT) technique. The hydrodynamic performance of the floating OWC device was evaluated in the time domain. The acceleration potential method, with a full-updated kernel matrix calculation associated with a mode decomposition scheme, was implemented to obtain accurate estimates of the hydrodynamic force and displacement of a freely floating BBDB. The developed NWT was based on the potential theory and the boundary element method with constant panels on the boundaries. The mixed Eulerian-Lagrangian (MEL) approach was employed to capture the nonlinear free surfaces inside the chamber that interacted with a pneumatic pressure, induced by the time-varying airflow velocity at the air duct. A special viscous damping was applied to the chamber free surface to represent the viscous energy loss due to the BBDB's shape and motions. The viscous damping coefficient was properly selected using a comparison of the experimental data. The calculated surface elevation, inside and outside the chamber, with a tuned viscous damping correlated reasonably well with the experimental data for various incident wave conditions. The conservation of the total wave energy in the computational domain was confirmed over the entire range of wave frequencies.

Keywords

References

  1. Brendmo, A., Falnes, J. and Lillebekken, P.M., 1996. Linear modelling of oscillating water columns including viscous loss. Applied Ocean Research, 18(2), pp.65-76. https://doi.org/10.1016/0141-1187(96)00011-9
  2. Delaure, E.M.C. and Lewis, A., 2003. 3D hydrodynamic modelling of fixed oscillating water column wave power plant by a boundary element methods. Ocean Engineering, 30(3), pp.309-330. https://doi.org/10.1016/S0029-8018(02)00032-X
  3. Evans, D.V., 1982. Wave power absorption by systems of oscillating surfacepressure distributions. Journal of Fluid Mechanics, 114, pp.481-499. https://doi.org/10.1017/S0022112082000263
  4. Falnes, J. and McIver, P., 1985. Surface wave interactions with systems of oscillating bodies and pressure distributions. Applied Ocean Research, 7(4), pp.225-234. https://doi.org/10.1016/0141-1187(85)90029-X
  5. Gato, L.M.C. and Falcao, A.F.O., 1988. Aerodynamics of the wells turbine. International Journal of Mechanical Science, 30, pp.383-395. https://doi.org/10.1016/0020-7403(88)90012-4
  6. Heath, T., Whittaker, T.J.T. and Boake, C.B., 2000. The design, construction and operation of the LIMPET wave energy converter. Proceedings of 4th European Wave Energy Conference, Aalborg, Denmark, 4-6 December 2000, pp.49-55.
  7. Hong, D.C., Hong, S.Y. and Hong, S.W., 2004a. Numerical study of the motions and drift force of a floating OWC device. Ocean Engineering, 31(2), pp.139-164. https://doi.org/10.1016/S0029-8018(03)00118-5
  8. Hong, D.C., Hong, S.Y. and Hong, S.W., 2004b. Numerical study on the reverse drift force of floating BBDB wave energy absorbers. Ocean Engineering, 31(10), pp.1257-1294. https://doi.org/10.1016/j.oceaneng.2003.12.007
  9. Imai, Y., Toyota, K., Nagata, S., Setoguchi, T., Oda, J., Matsunaga, N., Manago, Y. and Shimozono, T., 2009. Experimental study on negative drift force acting on a floating OWC-type wave energy converter "Backward Bent Duct Buoy". Proceedings of 19th International Offshore and Polar Engineering Conference, ISOPE, Osaka, Japan, 21-26 June 2009, pp.331-338.
  10. Kim, D. and Iwata, K., 1991. Dynamic behavior of tautly moored semi-submerged structure with pressurized air-chamber and resulting wave transformation. Coastal Engineering in Japan, 34(2), pp.223-242.
  11. Kim, J.H., Lew, J.H., Hong, D.C. and Hong, S.W., 2006. A study on motion and wave drift force of a BBDB type OWC wave energy device. Journal of Ocean Engineering and Technology, 20(2), pp.22-28.
  12. Kim, J.H., Lew, J.H., Hong, D.C., Kim, Y.S., Choi, H.S. and Hong, S.W., 2007. A study on motion of a BBDB type OWC wave energy device considering pneumatic damping coefficients in the duct. Proceedings of 17th International Offshore and Polar Engineering Conference, ISOPE, Lisbon, Portugal, 1-6 July 2007, pp.483-488.
  13. Koo, W.C. and Kim, M.H., 2004. Freely floating-body simulation by a 2D fully nonlinear numerical wave tank. Ocean Engineering, 31(16), pp.2011-2046. https://doi.org/10.1016/j.oceaneng.2004.05.003
  14. Koo, W.C. and Kim, M.H., 2010. A nonlinear time-domain simulation of a land-based oscillating water column. Journal of Waterway, Port, Coastal and Ocean Engineering, 136(5), pp.276-285. https://doi.org/10.1061/(ASCE)WW.1943-5460.0000051
  15. Koo, W.C. and Lee, K.R., 2011. Numerical and experimental analysis of Backward Bent Duct Buoy (BBDB) wave energy converter. Proceedings of the 21st International Offshore and Polar Engineering Conference, ISOPE, Hawaii, USA, 19-24 June 2011, pp.655-660.
  16. Koo, W.C., Kim, S.J. and Kim, M.H., 2012. Numerical analysis of a floating wave energy converter, Backward Bent Duct Buoy (BBDB) with different shaped-corners. Proceedings of 31st International Conference on Ocean, Offshore and Arctic Engineering, OMAE-83666, Rio de Janeiro, Brazil. 1-6 July 2012, pp.669-674.
  17. Masuda, Y., 1971. Wave activated generator. Proceedings of International Colloquium on Exposition of the Oceans, Bordeaux, France, March.
  18. Masuda, Y., Yamazaki, T., Outa, Y. and McCormick, M.E., 1987. Study of backward bent duct buoy. Proceedings of Oceans '87, IEEE, 19, pp.384-389.
  19. McCormick, M. and Sheehan, W., 1992. Positive drift of a backward-bent duct barge. Journal of Waterway, Port, Coastal, and Ocean Engineering, 118(1), pp.106-111. https://doi.org/10.1061/(ASCE)0733-950X(1992)118:1(106)
  20. McCormick, M.E., 2007. Ocean wave energycConversion. Dover Publication.
  21. Nagata, S., Toyota, K., Imai, Y. and Setoguchi, T., 2008. Experimental study on hydrodynamic forces acting on a floating wave energy converter 'Backward Bent Duct Buoy'. Proceedings of 18th International Offshore and Polar Engineering Conference, ISOPE, Vancouver, BC, Canada, 6-11 July 2008, pp.366-373.
  22. Nagata, S., Toyota, K., Imai, Y. and Setoguchi, T., 2009. Numerical simulation for evaluating of primary energy conversion of floating OWC-type wave energy converter. Proceedings of 19th International Offshore and Polar Engineering Conference, ISOPE, Osaka, Japan, 21-26 June 2009, pp.300-307.
  23. Park, M., Koo, W. and Choi, Y., 2010. Hydrodynamic interaction with an array of porous circular cylinders. International Journal of Naval Architecture and Ocean Engineering, 2(3), pp.146-154. https://doi.org/10.3744/JNAOE.2010.2.3.146
  24. Sarmento, A. and Falcao, A.F.O., 1985. Wave generation by an oscillating surface-pressure and its application in wave-energy extraction. Journal of Fluid Mechanics, 150, pp.467-485. https://doi.org/10.1017/S0022112085000234
  25. Suzuki, M. and Arakawa, C., 2000. Guide vanes effects of wells turbine for wave power generator. International Journal of Offshore and Polar Engineering, 10 (2), pp.153-159.
  26. Suzuki, M., Kuboki, T., Nagata, S. and Setoguchi, T., 2011. Numerical investigation of 2D optimal profile of backward-bent duct type wave energy converter. Journal of Offshore Mechanics and Arctic Engineering, 133, pp.041602-1. https://doi.org/10.1115/1.4003519
  27. Tanizawa, K. and Naito, S., 1997. A study on parametric roll motions by fully nonlinear numerical wave tank. Proceedings of 7th International Offshore and Polar Engineering Conference, ISOPE, Honolulu, USA, 3, 25-30 May 1997, pp.69-75.
  28. Toyota, K., Nagata, S., Imai, Y. and Setoguchi, T., 2008. Effects of hull shape on primary conversion characteristics of a floating OWC 'Backward Bent Duct Buoy'. Journal of Fluid Science and Technology, 3(3), pp.458-465. https://doi.org/10.1299/jfst.3.458
  29. Toyota, K., Nagata, S., Imai, Y. and Setoguchi, T., 2009. Research for evaluating performance of OWC-type wave energy converter 'Backward Bent Duct Buoy'. Proceedings of 8th European Wave and Tidal Energy Conference, Uppsala, Sweden, 7-10 September 2009, pp.901-913.
  30. Toyota, K., Nagata, S., Imai, Y., Oda, J. and Setoguchi, T., 2010. Primary energy conversion characteristics of a floating OWC 'Backward Bent Duct Buoy'. Proceedings of 20th International Offshore and Polar Engineering Conference, ISOPE, Beijing, China, 20-26 June 2010, pp.850-855.
  31. Vinje, T. and Brevig, P., 1981. Numerical simulation of breaking wave. Advances in Water Resources, 4(2), pp.77-82. https://doi.org/10.1016/0309-1708(81)90027-0
  32. Wang, D.J., Katory, M. and Li, Y.S., 2002. Analytical and experimental investigation on the hydrodynamic performance of onshore wave-power devices. Ocean Engineering, 29(8), pp.871-885. https://doi.org/10.1016/S0029-8018(01)00058-0