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Energy harvesting from stall-induced oscillations of pitching airfoils at high-subsonic regime

机译:高音速状态下俯仰机翼失速引起的振荡收集能量

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Stall-induced oscillations are nonlinear aeroelastic phenomena. Helicopter rotors, wind turbine blades, or other rotating components interacting with an airflow may vibrate in a stall condition. More recent applications of the phenomena include energy harvesting devices. In that context, the modeling of such devices is crucial for the comprehension of the key features of the harvesting process, allowing their optimization. In this sense, the present work adopts an electric-aeroelastic model to assess the power extracted from stall-induced oscillations in a Mach number range between 0.3 and 0.7. The model couples the equation of a generator to that describing the dynamics of a pitching typical section. Aerodynamic loads are given by the Beddoes-Leishman model. In a parametric analysis, it has been concluded that the structural stiffness does not lead to great modifications to the electric-aeroelastic response. On the other hand, variations in inertial parameters or in the elastic axis position strongly influence the harvesting process.
机译:失速引起的振荡是非线性气动弹性现象。直升机旋翼,风力涡轮机叶片或与气流相互作用的其他旋转组件可能会在失速状态下振动。这种现象的最新应用包括能量收集装置。在这种情况下,此类设备的建模对于理解收割过程的关键特征至关重要,因此可以对其进行优化。从这个意义上讲,本工作采用电-气动弹性模型来评估从失速引起的振荡中提取的马赫数在0.3到0.7之间的功率。该模型将发电机的方程式与描述俯仰典型部分的动力学的方程式耦合。气动载荷由Beddoes-Leishman模型给出。在参数分析中得出的结论是,结构刚度不会导致对电气动弹性响应的重大修改。另一方面,惯性参数或弹性轴位置的变化会强烈影响收割过程。

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