A Study on Motion and Wave Drift Force of a BBDB Type OWC Wave Energy Device

J. Ocean Eng. Technol. 2006;20(2):22-28.

Kim Jin-Ha;Lew Jae-Moon;Hong Do-Chun;Hong Seok-Won;

Ocean System Technology Department, MOERI/KORDI;Naval Architecture & Ocean Engineering Department, Chungnam National University;Naval Architecture & Ocean Engineering Department, Chungnam National University;Ocean System Technology Department, MOERI/KORDI

BBDB형 진동수주 파력발전장치의 운동 및 파랑표류력 연구

김진하;류재문;홍도천;홍석원;

한국해양연구원 해양시스템기술연구본부;충남대학교 선박해양공학과;충남대학교 선박해양공학과;한국해양연구원 해양시스템기술연구본부;

Keywords: Oscillating water column, BBDB (Backward-bent duct buoy), Pneumatic damping coefficient, Regression analysis, Wave drift force, Model test, Numerical simulation

핵심용어: 진동수주형 공기챔버, 공기감쇠력계수, 분산회귀, 파랑표류력, 모형시험, 수치계산

Abstract

The motion and wave drift forces of floating BBDB (backward-bent duct buoy) wave energy absorbers in regular waves are calculated, taking account of the oscillating surface-pressure due to the pressure drop in the air chamber above the oscillating water column, within the scope of the linear wave theory. A series of model tests has been conducted in order to order to verify the motion and time mean wave drift force reponses in regular waves at the ocean engineering basin, MOERI/KORDI. The pneumatic damping through an orifice-type duct for the BBDB wave energy device are deducted from experimental research. Numerical simulation for motion and drift force responses of the BBDB wave energy device, considering pneumatic damping coefficients, has been carried out, and the results are compared with those of model tests.