Effects of piezoelectric energy harvesting from a morphing flapping tail on its performance
Effects of piezoelectric energy harvesting from a morphing flapping tail on its performance
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DOI：
10.1016/j.apenergy.2023.122022
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发表时间：
2024-01
期刊：
影响因子：
11.2
通讯作者：
Hossam Alqaleiby;M. Ayyad;Muhammad R. Hajj;Saad A. Ragab;Lei Zuo
中科院分区：
文献类型：
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作者：
Hossam Alqaleiby;M. Ayyad;Muhammad R. Hajj;Saad A. Ragab;Lei Zuo
通过鱼类标签监测鱼类迁徙可能延伸数千公里，对于维持健康的鱼类种群和保护生物多样性非常重要。目前鱼牌的一个限制因素是它们的电池电量有限。将压电元件连接到鱼身体的振动部分，已经被提出用于开发自供电标签。为了确定这项技术的功能和潜力，我们提出了一种分析，显示了产生的电压随尾部响应的特定方面的变化。我们还进行了数值模拟来验证分析，并确定了附加压电元件对性能指标的影响，包括推力产生、推进效率和获取的电能。尾部附加了压电元件，模拟为单晶片梁以恒定的速度前进，并在其根部受到正弦俯仰的激励。水动力载荷计算采用三维非定常涡格法。这些载荷与运动方程耦合，运动方程用有限元方法求解。采用隐式有限差分格式对含时发电电压方程进行离散。分析表明，采集到的电功率依赖于尾缘的斜率，这一结果得到了数值模拟的验证。数值模拟表明，根据激励频率的不同，加装压电元件可以增大或减小推力。所需的水动力功率、发电的推进功率和收获的电力的平衡表明，根据激励频率的不同，可以收获相对较高的收获功率，而不会对水动力或推进功率产生很大的不利影响。对于特定的振荡频率，该方法和结果可用于确定设计参数，在该设计参数下，由压电元件获得的电能将对游动的鱼的水动力或推进功率产生最小的不利影响。
Monitoring fish migration, which can extend over distances of thousands of kilometers, via fish tags is important to maintain healthy fish stocks and preserve biodiversity. One constraint of current fish tags is the limited power of their batteries. Attaching a piezoelectric element to an oscillating part of the fish body has been proposed to develop self-powered tags. To determine the functionality and potential of this technology, we present an analysis showing variations of the generated voltage with specific aspects of the tail’s response. We also perform numerical simulations to validate the analysis and determine the effects of attaching a piezoelectric element on performance metrics including thrust generation, propulsive efficiency, and harvested electric power. The tail with the attached piezoelectric element is modeled as a unimorph beam moving at a constant forward speed and excited by sinusoidal pitching at its root. The hydrodynamic loads are calculated using three-dimensional unsteady vortex lattice method. These loads are coupled with the equation of motion, which is solved using the finite element method. The implicit finite different scheme is used to discretize the time-dependent generated voltage equation. The analysis shows that the harvested electric power depends on the slope of the trailing edge, a result that is validated with the numerical simulations. The numerical simulations show that, depending on the excitation frequency, attaching a piezoelectric element can increase or decrease the thrust force. The balance of required hydrodynamic power, generated propulsive power and harvested electrical power shows that, depending on the excitation frequency, relatively high levels of harvested power can be harvested without a high adverse impact on the hydrodynamic or propulsive power. For a specified frequency of oscillations, the approach and results can be used to identify design parameters where harvested electrical power by a piezoelectric element will have a minimal adverse impact on the hydrodynamic or propulsive power of a swimming fish.