Understanding Unsteady Flow Physics of Two Types of Vertical Axis Wind Turbines with a Fluid-Structure Interaction Approach

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dc.contributor.authorLiu, Kan
dc.contributor.authorYu, Meilin
dc.contributor.authorZhu, Weidon
dc.date.accessioned2018-01-23T15:14:26Z
dc.date.available2018-01-23T15:14:26Z
dc.date.issued2017
dc.description.abstractUnsteady flow physics of two types of vertical axis wind turbines (VAWTs), namely, a modified Savonius turbine and a hybrid Darrieus-modified-Savonius (HDMS) turbine, are numerically studied using a fluid-structure interaction approach. As a first step, a numerical solver is developed by coupling the wind turbine dynamics with a high-fidelity flow solver, thus, synchronizing the flow-turbine interaction. The solver is then used to study unsteady aerodynamics of wind-driven modified Savonius and HDMS VAWTs under different loading conditions. The relationship between the power efficiency and tip speed ratio (TSR) is invested for both types of wind turbines. It is found that there exists large disparity on energy harvesting performance between the two types of VAWTs under wind-driven flow conditions. The modified Savonius VAWT achieves relatively high power efficiency (~30% or ~51% of the Betz’s limit) at small TSRs; the HDMS VAWT achieves high power efficiency (~40% or ~67% of the Betz’s limit) at large TSRs. At the same incoming wind speed, the maximum power efficiency of the HDMS VAWT is about 10% higher than that of the Savonius VAWT. It is also observed that the external loading can affect dynamic stall over Darrieus blades of the HDMS VAWT, thus significantly varying the TSR and the corresponding energy harvesting efficiency.en_US
dc.format.extent14 pagesen_US
dc.genreconference papers and proceedingsen_US
dc.identifierdoi:10.13016/M20G3H076
dc.identifier.citationKan Liu, Meilin Yu, and Weidong Zhu. "Understanding Unsteady Flow Physics of Two Types of Vertical Axis Wind Turbines with a Fluid-Structure Interaction Approach", 35th Wind Energy Symposium, AIAA SciTech Forum, (AIAA 2017-0920) https://doi.org/10.2514/6.2017-0920en_US
dc.identifier.urihttp://hdl.handle.net/11603/7700
dc.language.isoen_USen_US
dc.publisherAIAA SciTech Forumen_US
dc.relation.isAvailableAtThe University of Maryland, Baltimore County (UMBC)
dc.relation.ispartofUMBC Mechanical Engineering Department Collection
dc.relation.ispartofUMBC Faculty Collection
dc.relation.ispartofUMBC Student Collection
dc.relation.ispartofseries35th Wind Energy Symposium;AIAA 2017-0920
dc.rightsThis item may be protected under Title 17 of the U.S. Copyright Law. It is made available by UMBC for non-commercial research and education. For permission to publish or reproduce, please contact the author.
dc.subjectunsteady flow physicsen_US
dc.subjectvertical axis wind turbinesen_US
dc.subjectSavonius turbineen_US
dc.subjecthybrid Darrieus-modified-Savonius turbineen_US
dc.subjectVAWTsen_US
dc.subjectunsteady aerodynamicsen_US
dc.subjectnumerical solveren_US
dc.titleUnderstanding Unsteady Flow Physics of Two Types of Vertical Axis Wind Turbines with a Fluid-Structure Interaction Approachen_US
dc.typeCollectionen_US

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