고정식 진동수주형 파력 발전장치의 챔버 유동 및 파에너지 변환효율 해석

• Published in: 大韓造船學會 論文集 Vol. 47; no. 3; pp. 388 - 397
• Main Authors: 구원철(Weon-Cheol Koo), 김무현(Moo-Hyun Kim), 최윤락(Yoon Rak Choi)
• Format: Journal Article
• Language: Korean
• Published: 대한조선학회 2010
• Subjects: 조선공학; Pneumatic pressure (공기압); Numerical wave tank(수치 파수조); Oscillating water column(진동 수주); Chamber(챔버); Viscous energy loss(점성 에너지 손실); Wave energyextraction(파력 추출)
• ISSN: 1225-1143; 2287-7355

A two-dimensional time-domain, potential-theory-based fully nonlinear numerical wave tank (NWT) was developed by using boundary element method and the mixed Eulerian-Lagrangian (MEL) approach for free-surface node treatment. The NWT was applied to prediction of primary wave energy conversion efficiency of a bottom-mounted oscillating water column (OWC) wave power device. The nonlinear free-surface condition inside the chamber was specially devised to represent the pneumatic pressure due to airflow velocity and viscous energy loss at the chamber entrance due to wave column motion. The newly developed NWT technique was verified through comparison with given experimental results. The maximum energy extraction was estimated with various chamber-air duct volume ratios.