{"title":"Stochastic performance of a torsional-flutter harvester in non-stationary, turbulent thunderstorm outflows","authors":"Luca Caracoglia","doi":"10.1016/j.jfluidstructs.2023.104050","DOIUrl":null,"url":null,"abstract":"<div><p>Efficiency of a torsional-flutter energy harvester in thunderstorm-like wind flows is studied. The apparatus has been proposed in recent years as an alternative to other flapping windmills of medium size due to its simple installation and operational mechanism. The paper investigates a rapid change of wind load intensity, induced by a thunderstorm, which may either reduce the output energy conversion or damage the apparatus. Aeroelastic load is replicated through unsteady Wagner’s indicial theory. The study explores the influence of both slowly-varying wind velocity variations, non-stationary turbulence of variable intensity and load perturbations. A stochastic model is derived to investigate both pre-critical and post-critical regimes. Various configurations are considered.</p></div>","PeriodicalId":54834,"journal":{"name":"Journal of Fluids and Structures","volume":null,"pages":null},"PeriodicalIF":3.4000,"publicationDate":"2024-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.sciencedirect.com/science/article/pii/S0889974623002189/pdfft?md5=09b390641ec517887af61961e7bceab8&pid=1-s2.0-S0889974623002189-main.pdf","citationCount":"0","resultStr":null,"platform":"Semanticscholar","paperid":null,"PeriodicalName":"Journal of Fluids and Structures","FirstCategoryId":"5","ListUrlMain":"https://www.sciencedirect.com/science/article/pii/S0889974623002189","RegionNum":2,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"","PubModel":"","JCR":"Q1","JCRName":"ENGINEERING, MECHANICAL","Score":null,"Total":0}
引用次数: 0
Abstract
Efficiency of a torsional-flutter energy harvester in thunderstorm-like wind flows is studied. The apparatus has been proposed in recent years as an alternative to other flapping windmills of medium size due to its simple installation and operational mechanism. The paper investigates a rapid change of wind load intensity, induced by a thunderstorm, which may either reduce the output energy conversion or damage the apparatus. Aeroelastic load is replicated through unsteady Wagner’s indicial theory. The study explores the influence of both slowly-varying wind velocity variations, non-stationary turbulence of variable intensity and load perturbations. A stochastic model is derived to investigate both pre-critical and post-critical regimes. Various configurations are considered.
期刊介绍：
The Journal of Fluids and Structures serves as a focal point and a forum for the exchange of ideas, for the many kinds of specialists and practitioners concerned with fluid–structure interactions and the dynamics of systems related thereto, in any field. One of its aims is to foster the cross–fertilization of ideas, methods and techniques in the various disciplines involved.
The journal publishes papers that present original and significant contributions on all aspects of the mechanical interactions between fluids and solids, regardless of scale.
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