Exploiting Stochastic Resonance Principles to Influence the Efficiency of a Torsional-Flutter Energy Harvester in Turbulent Winds1Source: ASME Letters in Dynamic Systems and Control:;2025:;volume( 005 ):;issue: 002::page 21006-1Author:Caracoglia, Luca
DOI: 10.1115/1.4067394Publisher: The American Society of Mechanical Engineers (ASME)
Abstract: Wind energy harvesters are emerging as a viable alternative to standard, large horizontal-axis wind turbines. This study continues a recent investigation on the operational features of a torsional-flutter-based apparatus, proposed by the author to extract wind energy. The apparatus is composed of a non-deformable, flapping blade-airfoil. A nonlinear torsional spring mechanism, either simulated by a Duffing model or a hybrid Duffing–van der Pol model, installed at equally spaced supports, enables limit-cycle, post-critical vibration. To enhance the output power, stochastic resonance principles are invoked through a novel, negative stiffness mechanism that is coupled to the eddy current device for energy conversion. The output power is explored by numerically solving the stochastic differential equation of the model, accounting for incoming flow turbulence. Three main harvester types with variable configuration are examined; the chord length of the blade-airfoil, used for energy harvesting, varies between 0.5 and 1 m; the spanwise-length-to-chord aspect ratio is four. The flapping frequency varies between 0.10 and 0.25 Hz. The study demonstrates that exploitation of negative stiffness mechanism can improve the performance of the harvester.
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contributor author | Caracoglia, Luca | |
date accessioned | 2025-04-21T10:34:01Z | |
date available | 2025-04-21T10:34:01Z | |
date copyright | 2/5/2025 12:00:00 AM | |
date issued | 2025 | |
identifier issn | 2689-6117 | |
identifier other | aldsc_5_2_021006.pdf | |
identifier uri | http://yetl.yabesh.ir/yetl1/handle/yetl/4306456 | |
description abstract | Wind energy harvesters are emerging as a viable alternative to standard, large horizontal-axis wind turbines. This study continues a recent investigation on the operational features of a torsional-flutter-based apparatus, proposed by the author to extract wind energy. The apparatus is composed of a non-deformable, flapping blade-airfoil. A nonlinear torsional spring mechanism, either simulated by a Duffing model or a hybrid Duffing–van der Pol model, installed at equally spaced supports, enables limit-cycle, post-critical vibration. To enhance the output power, stochastic resonance principles are invoked through a novel, negative stiffness mechanism that is coupled to the eddy current device for energy conversion. The output power is explored by numerically solving the stochastic differential equation of the model, accounting for incoming flow turbulence. Three main harvester types with variable configuration are examined; the chord length of the blade-airfoil, used for energy harvesting, varies between 0.5 and 1 m; the spanwise-length-to-chord aspect ratio is four. The flapping frequency varies between 0.10 and 0.25 Hz. The study demonstrates that exploitation of negative stiffness mechanism can improve the performance of the harvester. | |
publisher | The American Society of Mechanical Engineers (ASME) | |
title | Exploiting Stochastic Resonance Principles to Influence the Efficiency of a Torsional-Flutter Energy Harvester in Turbulent Winds1 | |
type | Journal Paper | |
journal volume | 5 | |
journal issue | 2 | |
journal title | ASME Letters in Dynamic Systems and Control | |
identifier doi | 10.1115/1.4067394 | |
journal fristpage | 21006-1 | |
journal lastpage | 21006-7 | |
page | 7 | |
tree | ASME Letters in Dynamic Systems and Control:;2025:;volume( 005 ):;issue: 002 | |
contenttype | Fulltext |