Inertial effects of the semi-passive flapping foil on its energy extraction efficiency
Inertial effects of the semi-passive flapping foil on its energy extraction efficiency
复制标题
半被动扑翼的惯性效应对其能量提取效率的影响
DOI：
10.1063/1.4921384
复制
发表时间：
2015-05-01
影响因子：
4.6
通讯作者：
Shao, Xueming
中科院分区：
文献类型：
--
作者：
Deng, Jian;Teng, Lubao;Shao, Xueming
惯性在经历流致振动的系统的响应中起着重要作用，先前的研究人员对此进行了广泛的研究。然而，采用流激振动机制的能量采集器的惯性效应却很少引起人们的关注。本文重点研究考虑惯性效应的半被动能量提取系统。使用基于有限体积的数值求解器和移动网格技术来求解不可压缩的纳维-斯托克斯方程。采用分区方法通过子迭代技术和 Aitken 松弛来耦合流体和结构运动，从而保证了强流固耦合。此外，还添加了虚拟质量来解决低密度比引起的数值不稳定问题。首先，在 r = 1 的固定质量比下，我们确定了一组最佳参数，在该参数下可实现 η = 34% 的最大效率。 r 的范围从 0.125 到 100 进行了进一步的研究......
The inertia plays a significant role in the response of a system undergoing flow-induced vibrations, which has been extensively investigated by previous researchers. However, the inertial effects of an energy harvester employing the mechanism of flow-induced vibrations have attracted little attention. This paper concentrates on a semi-passive energy extraction system considering its inertial effects. The incompressible Navier-Stokes equations are solved using a finite-volume based numerical solver with a moving grid technique. A partitioned method is used to couple the fluid and structure motions with the sub-iteration technique and an Aitken relaxation, which guarantees a strong fluid-structure coupling. In addition, a fictitious mass is added to resolve the numerical instability aroused by low density ratios. First, at a fixed mass ratio of r = 1, we identify an optimal set of parameters, at which a maximum efficiency of η = 34% is achieved. Further studies with r ranging from 0.125 to 100 are performed...