Vortex-induced vibration (VIV)-based energy harvester with a circular cylinder as a bluff body is a classic choice for harvesting wind energy, while it is only effective in a limited wind speed range known as the lock-in or synchronization region. To enhance the effectiveness of circular cylinder-based energy harvesting systems, this effort proposes the concept of placing an interference rectangular plate in the wake of the circular cylinder with determining the most effective design of the rectangular plate location and dimension. A series of wind tunnel experiments are conducted to prove the usefulness of the downstream rectangular plate and how it positively or negatively affect the harvester's efficacy. The width of the plate is 1D, three height scenarios of the plate are considered, namely, 1D, 2D, or 3D, and the space between the cylinder and the plate is varied between 0.1D to 2.0D, where D is the cylindrical diameter. Experimental results show that for a specific plate height, galloping-type response (i.e., full interference between galloping and VIV), partial interference between galloping and VIV, and lock-in-type response are observed successively with increasing the space between the cylinder and the plate. The galloping-type response, which often occurs when a rectangular plate is placed close to the circular cylinder, can dramatically increase the effective wind speed range for energy harvesting and the generated voltages at higher wind speeds. The most effective design scheme among the tested cases is a 2D-high plate placed around 0.2D ∼ 0.4D downstream of the circular cylinder. The downstream rectangular plate can work as a competitive candidate for enhancing the performance of a circular-based energy harvester due to its effectiveness and reduced cost than other aerodynamic modification measures that are spanned over the whole length of the circular cylinder.

以圆柱体作为钝体的基于涡激振动 (VIV) 的能量收集器是收集风能的经典选择，但它仅在称为锁定或同步区域的有限风速范围内有效。为了提高基于圆柱体的能量收集系统的有效性，这项工作提出了在圆柱体后面放置干涉矩形板的概念，以确定矩形板位置和尺寸的最有效设计。进行了一系列风洞实验以证明下游矩形板的有用性以及它如何积极或消极地影响收割机的效率。板的宽度为 1 D，考虑了板的三种高度方案，即 1D、 2 D或 3 D，并且圆柱体和板之间的空间在 0.1 D到 2.0 D之间变化，其中D是圆柱直径。实验结果表明，对于特定的板高度，随着圆柱体与VIV之间的间距的增加，依次观察到了奔腾型响应（即奔腾与VIV之间的完全干涉）、奔腾与VIV之间的部分干涉和锁定型响应。碟子。当矩形板靠近圆柱体放置时，通常会发生飞驰型响应，它可以显着增加能量收集的有效风速范围以及在更高风速下产生的电压。测试案例中最有效的设计方案是在 0.2 D ∼ 0.4 D左右放置一个 2 D高的板圆柱体的下游。下游矩形板可以作为增强基于圆形的能量收集器性能的竞争候选者，因为它的有效性和比跨越圆柱整个长度的其他空气动力学修改措施更低的成本。