Fully nonlinear analysis incorporating viscous effects for hydrodynamics of an oscillating wave surge converter with nonlinear power take-off system
Fully nonlinear analysis incorporating viscous effects for hydrodynamics of an oscillating wave surge converter with nonlinear power take-off system
复制标题
结合粘性效应的全非线性分析，用于具有非线性动力输出系统的振荡波浪涌转换器的流体动力学
DOI：
10.1016/j.energy.2019.04.189
复制
发表时间：
2019-07
期刊：
影响因子：
9
通讯作者：
Gangjun Zhai
中科院分区：
文献类型：
--
作者：
Yong Cheng;Chunyan Ji;Gangjun Zhai
WaveRoller可以被归类为安装在近岸沿海地区的有效振荡浪涌转换器（OWSC）。本文基于全非线性时域高阶边界元法（HOBEM）研究了二维（2-D） WaveRoller的水动力性能。分析了翼板时变运动与水轮发电机耦合的非线性动力起飞（PTO）中波浪能提取的机理。采用简化的Morison模型确定结构运动方程中的黏度项。本文的模型与已有的实验和数值结果进行了对比，得到了顶沿穿透水面的OWSC模型的有效性。通过数值模拟研究了波非线性和PTO非线性等非线性现象的产生机理。通过对有二次阻尼项和没有二次阻尼项的数值结果的比较，量化了粘度的影响。数值结果表明，当入射波幅值较大时，高阶自由波分量的增强降低了捕获效率，PTO非线性变得更加突出。此外，粘性引起的最大差异发生在共振区。
WaveRoller can be classified as an effective Oscillating wave surge converter (OWSC) installed in nearshore coastal areas. In this study, the hydrodynamic performance of a two-dimensional (2-D) WaveRoller is investigated based on a fully nonlinear time-domain higher-order boundary element method (HOBEM). The mechanism through which the wave power is extracted, is analyzed in a nonlinear power take-off (PTO) by coupling the time-varying motion of the flap and hydro-electric generator. A simplified Morison model is used to determine the viscosity term in the structural motion equation. The present model is validated against the published experimental and numerical results for an OWSC with its top edge piercing through the water surface. Numerical simulations are undertaken to investigate the mechanism of the nonlinear phenomenon including wave nonlinearity and PTO nonlinearity. The influence of the viscosity is also quantified by comparing the numerical results with and without the quadratic damping term. Numerical results indicate that when the incident wave amplitude is large, the capture efficiency is reduced by the strengthen higher order free wave components, and the PTO nonlinearity becomes more prominent. Furthermore, the maximum discrepancy induced by the viscosity occurs in the resonant zone.
登录
查看更多内容
影响因子：
8.7
作者：
H. R. Mottahedi;M. Anbarsooz;M. Passandideh-Fard
通讯作者：
H. R. Mottahedi;M. Anbarsooz;M. Passandideh-Fard
DOI：
--
发表时间：
2011
期刊：
--
影响因子：
--
作者：
X. B. Chen;F. Dias;W. Duan
通讯作者：
X. B. Chen;F. Dias;W. Duan
DOI：
10.1115/omae2014-23171
发表时间：
2014-06
期刊：
--
影响因子：
--
作者：
Yanji Wei;A. Henry;O. Kimmoun;F. Dias
通讯作者：
Yanji Wei;A. Henry;O. Kimmoun;F. Dias
旋转襟翼产生的溅流和撞击
影响因子：
4.6
作者：
Sun, S. Y.;Sun, S. L.;Ren, H. L.;Wu, G. X.
通讯作者：
Wu, G. X.
DOI：
10.1098/rsta.2011.0152
发表时间：
2012-01-28
影响因子：
5
作者：
Whittaker, Trevor;Folley, Matt
通讯作者：
Folley, Matt