Comparative Study of Dynamic Stall between an Aircraft Airfoil and a Wind Turbine Airfoil in an Air–Particle Flow

Dynamic stall in clean air flow has been well studied, but its exploration in air–particle (air–raindrop or air–sand) flow is still lacking. The aerodynamic performance loss of aircraft (NACA0012) and wind turbine (S809) airfoils and their differences during the hysteresis loop at different pitching...

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Autores principales:	Junjun Jin, Zhiliang Lu, Tongqing Guo, Di Zhou, Qiaozhong Li
Formato:	article
Lenguaje:	EN
Publicado:	MDPI AG 2021
Materias:	dynamic stall gas–solid flow airfoil lift coefficient reduced frequency mean angle of attack 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/701a1a5d40cc40b49d10872628d3e85e
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spelling	oai:doaj.org-article:701a1a5d40cc40b49d10872628d3e85e2021-11-25T16:40:54ZComparative Study of Dynamic Stall between an Aircraft Airfoil and a Wind Turbine Airfoil in an Air–Particle Flow10.3390/app1122109202076-3417https://doaj.org/article/701a1a5d40cc40b49d10872628d3e85e2021-11-01T00:00:00Zhttps://www.mdpi.com/2076-3417/11/22/10920https://doaj.org/toc/2076-3417Dynamic stall in clean air flow has been well studied, but its exploration in air–particle (air–raindrop or air–sand) flow is still lacking. The aerodynamic performance loss of aircraft (NACA0012) and wind turbine (S809) airfoils and their differences during the hysteresis loop at different pitching parameters are also poorly understood. As shown in this paper, the reduced frequency has little effect on the value of the maximum lift coefficient increment caused by particles, but a larger one can enhance the hysteresis effect and drag the angle of attack, at which the maximum increment is obtained, from the up stroke to the down stroke. The large lift coefficient increments of two airfoils and their difference also have a similar change trend with the reduced frequency. Compared to that of NACA0012 airfoil, the increments of S809 airfoil are obviously greater at three mean angles of attack, especially at 8°, which is the commonly used operating angle. In addition, the angle of attack, at which the maximum lift coefficient is obtained, can be significantly changed by particles in two regions: one is under the effect of deep stall, the other is under the effect of light stall at a low, reduced frequency.Junjun JinZhiliang LuTongqing GuoDi ZhouQiaozhong LiMDPI AGarticledynamic stallgas–solid flowairfoillift coefficientreduced frequencymean angle of attackTechnologyTEngineering (General). Civil engineering (General)TA1-2040Biology (General)QH301-705.5PhysicsQC1-999ChemistryQD1-999ENApplied Sciences, Vol 11, Iss 10920, p 10920 (2021)
institution	DOAJ
collection	DOAJ
language	EN
topic	dynamic stall gas–solid flow airfoil lift coefficient reduced frequency mean angle of attack Technology T Engineering (General). Civil engineering (General) TA1-2040 Biology (General) QH301-705.5 Physics QC1-999 Chemistry QD1-999
spellingShingle	dynamic stall gas–solid flow airfoil lift coefficient reduced frequency mean angle of attack Technology T Engineering (General). Civil engineering (General) TA1-2040 Biology (General) QH301-705.5 Physics QC1-999 Chemistry QD1-999 Junjun Jin Zhiliang Lu Tongqing Guo Di Zhou Qiaozhong Li Comparative Study of Dynamic Stall between an Aircraft Airfoil and a Wind Turbine Airfoil in an Air–Particle Flow
description	Dynamic stall in clean air flow has been well studied, but its exploration in air–particle (air–raindrop or air–sand) flow is still lacking. The aerodynamic performance loss of aircraft (NACA0012) and wind turbine (S809) airfoils and their differences during the hysteresis loop at different pitching parameters are also poorly understood. As shown in this paper, the reduced frequency has little effect on the value of the maximum lift coefficient increment caused by particles, but a larger one can enhance the hysteresis effect and drag the angle of attack, at which the maximum increment is obtained, from the up stroke to the down stroke. The large lift coefficient increments of two airfoils and their difference also have a similar change trend with the reduced frequency. Compared to that of NACA0012 airfoil, the increments of S809 airfoil are obviously greater at three mean angles of attack, especially at 8°, which is the commonly used operating angle. In addition, the angle of attack, at which the maximum lift coefficient is obtained, can be significantly changed by particles in two regions: one is under the effect of deep stall, the other is under the effect of light stall at a low, reduced frequency.
format	article
author	Junjun Jin Zhiliang Lu Tongqing Guo Di Zhou Qiaozhong Li
author_facet	Junjun Jin Zhiliang Lu Tongqing Guo Di Zhou Qiaozhong Li
author_sort	Junjun Jin
title	Comparative Study of Dynamic Stall between an Aircraft Airfoil and a Wind Turbine Airfoil in an Air–Particle Flow
title_short	Comparative Study of Dynamic Stall between an Aircraft Airfoil and a Wind Turbine Airfoil in an Air–Particle Flow
title_full	Comparative Study of Dynamic Stall between an Aircraft Airfoil and a Wind Turbine Airfoil in an Air–Particle Flow
title_fullStr	Comparative Study of Dynamic Stall between an Aircraft Airfoil and a Wind Turbine Airfoil in an Air–Particle Flow
title_full_unstemmed	Comparative Study of Dynamic Stall between an Aircraft Airfoil and a Wind Turbine Airfoil in an Air–Particle Flow
title_sort	comparative study of dynamic stall between an aircraft airfoil and a wind turbine airfoil in an air–particle flow
publisher	MDPI AG
publishDate	2021
url	https://doaj.org/article/701a1a5d40cc40b49d10872628d3e85e
work_keys_str_mv	AT junjunjin comparativestudyofdynamicstallbetweenanaircraftairfoilandawindturbineairfoilinanairparticleflow AT zhilianglu comparativestudyofdynamicstallbetweenanaircraftairfoilandawindturbineairfoilinanairparticleflow AT tongqingguo comparativestudyofdynamicstallbetweenanaircraftairfoilandawindturbineairfoilinanairparticleflow AT dizhou comparativestudyofdynamicstallbetweenanaircraftairfoilandawindturbineairfoilinanairparticleflow AT qiaozhongli comparativestudyofdynamicstallbetweenanaircraftairfoilandawindturbineairfoilinanairparticleflow
_version_	1718413083348566016

Comparative Study of Dynamic Stall between an Aircraft Airfoil and a Wind Turbine Airfoil in an Air–Particle Flow

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