CAJ | 학술논문

球体波能转换装置在波浪的激励下可以同时在水平和竖直两个模式振荡。基于线性微幅波浪和势流理论，将波浪与球体相互作用简化为球体固定不动，波浪绕过球体和球体在静止流体中运动。线性叠加以后得到总的速度势，计算出球体波能转换装置的平均功率和能量俘获宽度因子的解析表达式。理论研究表明：装置与波浪运动的相位差是影响波能的最重要的参数，最优相位差为-π/2，并且给出了最优相位差调节的理论表达式。另外，对波长、波幅、球体半径、水深和球心距静水面的距离等因素也进行了分析。
구체파능전환장치재파랑적격려하가이동시재수평화수직량개모식진탕。기우선성미폭파랑화세류이론，장파랑여구체상호작용간화위구체고정불동，파랑요과구체화구체재정지류체중운동。선성첩가이후득도총적속도세，계산출구체파능전환장치적평균공솔화능량부획관도인자적해석표체식。이론연구표명：장치여파랑운동적상위차시영향파능적최중요적삼수，최우상위차위-π/2，병차급출료최우상위차조절적이론표체식。령외，대파장、파폭、구체반경、수심화구심거정수면적거리등인소야진행료분석。
A floating spherical wave energy converter submerged under the water surface is studied. The con-verter can oscillate in both horizontal and vertical modes induced by waves and transfer mechanical energy forward by hydraulic cylinders. Based on the linear potential theory of airy waves, the interaction of the waves and the wave energy converters can be divided into two parts. One is flow past a fixed spherical body. The other is a spherical body moving in fluid at rest. By linear superposition of the two parts of velocity po-tential, the final velocity potential is achieved. Then the time-averaged power capture and power capture width ratio is calculated. Different parameters that affect the efficiency of wave energy harvesting are ana-lyzed. The optimal phase difference between the motion of converters and water particles is obtained with a value of -π/2. And phase control is needed to keep the optimal phase difference for different waves. The radius of the spherical body, the wave length and wave amplitude and water depth, as well as the distance of the center of the wave energy converter from the surface, have effects on the efficiency of power capture.