振荡水柱波能转换器的消反射特性研究

基于势流理论,建立了振荡水柱(OWC)型波能转换器的二维数学模型.采用去奇异的边界积分方程法(DBIEM)模拟了完全非线性波.通过调整OWC腔室内振荡压强的幅值和相位,使OWC工作于消反射状态.研究了波能吸收效率与OWC腔室内振荡压强的幅值、相位的关系.数值计算表明:消反射时,OWC的波能吸收效率比传统形式的OWC高很多.在消反射状态下,OWC腔室内振荡压强和通过透平气体流量的幅值增大且二者存在相位差,这与传统的OWC是不同的.最后提出了不同于传统形式的新型OWC波能转换器的设计思路.

Anti-reflection Characteristics of Oscillating Water Column Wave Energy Device

Based on the potential flow theory,a two-dimension mathematical model of oscillating water column(OWC) wave energy device was obtained.The fully nonlinear wave was simulated in the desigularized boundary integral equation method(DBIEM).The anti-reflection was achieved by adjusting the amplitude and phase of the oscillating air pressure in the OWC’s chamber.The relationship of the wave energy absorption efficiency with the amplitude and phase of the oscillating air pressure in the OWC’s chamber was investigated.Numerical results have shown that the wave energy absorption efficiency of OWC at anti-reflection is much higher than that of the traditional OWC.Under the condition of anti-reflection,the amplitudes of the oscillating air pressure in the chamber and the flow through the turbine are much higher,and the phase differences between the two are observed,which differ from the traditional OWC.A novel design idea of the OWC wave energy device was also presented.