An Introductory Study of The Dynamics of Autorotation for Wind Energy Harvesting
An Introductory Study of The Dynamics of Autorotation for Wind Energy Harvesting
复制标题
风能收集自转动力学的介绍性研究
DOI：
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发表时间：
2014
期刊：
影响因子：
--
通讯作者：
B. Salih
中科院分区：
文献类型：
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作者：
B. Salih
几十年来，风力涡轮机一直被用来收集风能。它们只适合在靠近地面的地方工作，并且有几个缺点，这些缺点与风能的可用性以及与建筑成本相比提取的电力的数量有关。另一方面，在高海拔地区有充足的风能。高海拔8−12公里处的急流无处不在且持续存在，有可能产生巨大的风能。即使在中等海拔4−5公里的地方，风力密度也比地面高得多，而且更一致。因此，在本论文的研究中，我们研究了从高空获取能量的问题。首先，我们对现有的两种机载风能收集理论方法--系留翼型和静态自旋仪进行了全面的回顾。后一种方法具有固有的优势，值得进一步研究。自转是一种众所周知的现象，在与强风相互作用产生的强大气动力和力矩的作用下，转子保持其角速度并保持显著的升力。自转已在直升机自由降落的背景下进行了研究，但尚未考虑用于能量收集。现有的模型主要集中在静力学分析上。在这项研究中，我们提出了一个简单的陀螺仪动力学模型，目标是最终实现自动旋转能量系统(AES)。我们工作的重点是对自转进行初步的动力学分析，探索利用自转设计一种能够同时在高空飞行和利用风能的多用途系统的可能性。提出的初步动力学模型被用来生成一个仿真平台，用于研究陀螺仪的基本动作。文中还给出了大量的仿真结果，以评估该算法的动态性能。文中还给出了能量收集分析和结果。预计结果将指导选择驱动和控制，这将是产生净能源产生或能源效率的组合自转和动力III飞行所必需的。这项研究将与系留和非系留的AES相关，也可以被整合到基于多旋翼的无人机，如四旋翼。
Wind turbines have been used for decades to harvest wind energy. They are suitable only to work on close to ground, and have several drawbacks that are related to the availability of the wind and the amount of extracted power compared with the cost of construction. On the other hand, there is an abundant wind power that is available at high altitudes. The wind jet streams at high elevations 8− 12 kms are pervasive and persistent, and can potentially produce immense wind energy. Even at moderate elevations of 4 − 5 kms, wind power densities are much higher than on ground and more consistent. Consequently, in this thesis research, we investigate the topic of harvesting energy from high altitudes. First, we provide a comprehensive review of two existing theoretical methods that are proposed for airborne wind energy harvesting, the tethered airfoil, and the static autogyro. The latter approach has inherent advantages that warrant further investigation. Autorotation is a well-known phenomenon where a rotor sustains its angular velocity and maintains significant lift in the presence of strong aerodynamic forces and torques generated by interaction with a strong wind field. Autorotation has been researched in the context of free descent of helicopters but has not been considered for energy harvesting. Existing models have mainly focused on statics analysis. In this research, we propose a simple dynamic model of the Autogyro, with the goal of ultimately realizing an Autorotation Energy System (AES). The focus of our work is to provide a preliminary dynamic analysis of autorotation, which is largely absent in current literature, to explore the possibility of using autorotation for designing a multipurpose system that can simultaneously fly at high altitudes and generate energy from the wind. The proposed preliminary dynamic model is used to generate a simulation platform, which is used to explore the autogyros rudimentary maneuvers. Extensive simulation results are provided to evaluate the dynamic performance of AES. Energy harvesting analyses and results are also presented. It is expected that the results will guide the choice of actuations and control that will be necessary for generating combined autorotation and powered iii flights that would be net energy generating or energy efficient. The research will be relevant for both tethered and untethered AES and could also be incorporated into multi-rotor based UAVs such as quadrotors.
自旋翼机理论在机载风能提取中的应用
DOI：
10.1115/dscc2013-3840
发表时间：
2013
期刊：
Proceedings of the 2013 ASME Dynamic Systems and Control Conference
影响因子：
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作者：
Rimkus, Sigitas;Das, Tuhin
通讯作者：
Das, Tuhin