Dynamic Stall Characteristics of the Bionic Airfoil with Different Waviness Ratios

A dynamic stall will cause dramatic changes in the aerodynamic performance of the blade, resulting in a sharp increase in the blade vibration load. The bionic leading-edge airfoil with different waviness ratios, inspired by the humpback whales flipper, is adopted to solve this problem. In this study...

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Autores principales:	Liming Wu, Xiaomin Liu
Formato:	article
Lenguaje:	EN
Publicado:	MDPI AG 2021
Materias:	airfoil bionic structure stall characteristics aerodynamic performance flow control numerical simulation Technology T Engineering (General). Civil engineering (General) TA1-2040 Biology (General) QH301-705.5 Physics QC1-999 Chemistry QD1-999
Acceso en línea:	https://doaj.org/article/c84b389bed634bc69d17577cd363264c
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spelling	oai:doaj.org-article:c84b389bed634bc69d17577cd363264c2021-11-11T15:02:15ZDynamic Stall Characteristics of the Bionic Airfoil with Different Waviness Ratios10.3390/app112199432076-3417https://doaj.org/article/c84b389bed634bc69d17577cd363264c2021-10-01T00:00:00Zhttps://www.mdpi.com/2076-3417/11/21/9943https://doaj.org/toc/2076-3417A dynamic stall will cause dramatic changes in the aerodynamic performance of the blade, resulting in a sharp increase in the blade vibration load. The bionic leading-edge airfoil with different waviness ratios, inspired by the humpback whales flipper, is adopted to solve this problem. In this study, based on the NACA0015 airfoil, the three-dimensional unsteady numerical simulation and sliding mesh technique are used to reveal the flow control mechanism on the dynamic stall of the bionic wavy leading edge. The effects of the waviness ratio on the dynamic stall characteristics of the airfoil are also investigated. The results show that the peak drag coefficient is dramatically reduced when a sinusoidal leading edge is applied to the airfoil. Although the peak lift coefficient is also reduced, the reduction is much smaller. When the waviness ratio R is 0.8, the peak drag coefficient of the airfoil is reduced by 17.14% and the peak lift coefficient of the airfoil is reduced by 9.20%. The dynamic hysteresis effect is improved gradually with an increasing waviness ratio. For the bionic airfoil with R = 1.0, the area of the hysteresis loop is the smallest.Liming WuXiaomin LiuMDPI AGarticleairfoilbionic structurestall characteristicsaerodynamic performanceflow controlnumerical simulationTechnologyTEngineering (General). Civil engineering (General)TA1-2040Biology (General)QH301-705.5PhysicsQC1-999ChemistryQD1-999ENApplied Sciences, Vol 11, Iss 9943, p 9943 (2021)
institution	DOAJ
collection	DOAJ
language	EN
topic	airfoil bionic structure stall characteristics aerodynamic performance flow control numerical simulation Technology T Engineering (General). Civil engineering (General) TA1-2040 Biology (General) QH301-705.5 Physics QC1-999 Chemistry QD1-999
spellingShingle	airfoil bionic structure stall characteristics aerodynamic performance flow control numerical simulation Technology T Engineering (General). Civil engineering (General) TA1-2040 Biology (General) QH301-705.5 Physics QC1-999 Chemistry QD1-999 Liming Wu Xiaomin Liu Dynamic Stall Characteristics of the Bionic Airfoil with Different Waviness Ratios
description	A dynamic stall will cause dramatic changes in the aerodynamic performance of the blade, resulting in a sharp increase in the blade vibration load. The bionic leading-edge airfoil with different waviness ratios, inspired by the humpback whales flipper, is adopted to solve this problem. In this study, based on the NACA0015 airfoil, the three-dimensional unsteady numerical simulation and sliding mesh technique are used to reveal the flow control mechanism on the dynamic stall of the bionic wavy leading edge. The effects of the waviness ratio on the dynamic stall characteristics of the airfoil are also investigated. The results show that the peak drag coefficient is dramatically reduced when a sinusoidal leading edge is applied to the airfoil. Although the peak lift coefficient is also reduced, the reduction is much smaller. When the waviness ratio R is 0.8, the peak drag coefficient of the airfoil is reduced by 17.14% and the peak lift coefficient of the airfoil is reduced by 9.20%. The dynamic hysteresis effect is improved gradually with an increasing waviness ratio. For the bionic airfoil with R = 1.0, the area of the hysteresis loop is the smallest.
format	article
author	Liming Wu Xiaomin Liu
author_facet	Liming Wu Xiaomin Liu
author_sort	Liming Wu
title	Dynamic Stall Characteristics of the Bionic Airfoil with Different Waviness Ratios
title_short	Dynamic Stall Characteristics of the Bionic Airfoil with Different Waviness Ratios
title_full	Dynamic Stall Characteristics of the Bionic Airfoil with Different Waviness Ratios
title_fullStr	Dynamic Stall Characteristics of the Bionic Airfoil with Different Waviness Ratios
title_full_unstemmed	Dynamic Stall Characteristics of the Bionic Airfoil with Different Waviness Ratios
title_sort	dynamic stall characteristics of the bionic airfoil with different waviness ratios
publisher	MDPI AG
publishDate	2021
url	https://doaj.org/article/c84b389bed634bc69d17577cd363264c
work_keys_str_mv	AT limingwu dynamicstallcharacteristicsofthebionicairfoilwithdifferentwavinessratios AT xiaominliu dynamicstallcharacteristicsofthebionicairfoilwithdifferentwavinessratios
_version_	1718437543677001728

Dynamic Stall Characteristics of the Bionic Airfoil with Different Waviness Ratios

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