Vortex-induced energy harvesting of an elliptic blade in high-Reynolds lid-driven cavity flow
Publish Year: 1401
نوع سند: مقاله ژورنالی
زبان: English
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شناسه ملی سند علمی:
JR_ANMD-1-2_006
تاریخ نمایه سازی: 9 اردیبهشت 1402
Abstract:
Lid-driven cavity flow is characterized by large-scale energetic eddies which are potential for energy harvesting purposes. The present article deals with numerical study of vortex-induced autorotation of an elliptic blade hinged at the center of a lid-driven cavity.Immersed boundary method is utilized to solve the governing equations for this moving boundary problem. Four different blade dimensions are considered at a fairly high-Reynolds number to evaluate the impact of various vortex types and flow unsteadiness on the blade dynamics. Small-amplitude fluttering, clockwise autorotation and counter-clockwise autorotation are three dominant modes observed at various configurations and different temporal stages. The average-length blade is equally characterized by vortices at both directions, and consequently experiences a fluttering mode. In contrast, short (long) bladeis mainly affected by one dominant vortex type, leading to steady autorotation in counter-clockwise (clockwise) direction. At stable autorotation of blade in both directions, regular cyclic temporal oscillations are observed in the rotational speed, which are due to cyclic evolution of the near-blade vortices and their alternating moment applied to the blade.
Keywords:
Lid-driven cavity flow is characterized by large-scale energetic eddies which are potential for energy harvesting purposes. The present article deals with numerical study of vortex-induced autorotation of an elliptic blade hinged at the center of a l , clockwise autorotation and counter-clockwise autorotation are three dominant modes observed at various configurations and different temporal stages. The average-length blade is equally characterized by vortices at both directions , and consequently experiences a fluttering mode. In contrast , short (long) bladeis mainly affected by one dominant vortex type , leading to steady autorotation in counter-clockwise (clockwise) direction. At stable autorotation of blade in both directions , regular cyclic temporal oscillations are observed in the rotational speed , which are due to cyclic evolution of the near-blade vortices and their alternating moment applied to the blade
Authors
Ali Akbar Hosseinjani
Department of Mechanical Engineering, Qazvin Branch, Islamic Azad University, Qazvin, Iran.
Ghasem Akbari
Department of Mechanical Engineering, Qazvin Branch, Islamic Azad University, Qazvin, Iran.
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