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    Gurney-Flap Drag Penalty Reduction with a DBD Plasma Actuator

    Source: Journal of Aerospace Engineering:;2017:;Volume ( 030 ):;issue: 005
    Author:
    Zeng Zhang
    ,
    Lihao Feng
    ,
    Jinjun Wang
    ,
    Peiqing Liu
    DOI: 10.1061/(ASCE)AS.1943-5525.0000769
    Publisher: American Society of Civil Engineers
    Abstract: The present research proposed a method to reduce the Gurney-flap drag penalty with a dielectric barrier discharge (DBD) plasma actuator, which was mounted in front of the Gurney flap to generate a countercurrent wall jet. The research was based on numerical simulation, which was performed on a NACA 0012 airfoil with Gurney-flap heights (h) of 1, 2, and 3%c at Rc=6.84×105. According to the simulation results, the wall jet was able to decrease the additional drag on the Gurney flap by lowering the upstream pressure of the Gurney flap without disturbing the flow field downstream of the Gurney flap. The drag reduction effect was more obvious at low angles of attack and small Gurney-flap height, and a drag reduction of 15% was achieved at α=0° with 1%c flap height. This method also lowered total lift, but it was not strong enough to impair the high-lift property of the Gurney flap. For all tested Gurney-flap heights, the lift-drag ratios under low to moderate CL were enhanced by this approach. Comparing with the clean airfoil, a 12% increment of lift-drag ratio was obtained at cruise with plasma control at h/c=1% flap height.
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      Gurney-Flap Drag Penalty Reduction with a DBD Plasma Actuator

    URI
    http://yetl.yabesh.ir/yetl1/handle/yetl/4241976
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    contributor authorZeng Zhang
    contributor authorLihao Feng
    contributor authorJinjun Wang
    contributor authorPeiqing Liu
    date accessioned2017-12-16T09:22:16Z
    date available2017-12-16T09:22:16Z
    date issued2017
    identifier other%28ASCE%29AS.1943-5525.0000769.pdf
    identifier urihttp://138.201.223.254:8080/yetl1/handle/yetl/4241976
    description abstractThe present research proposed a method to reduce the Gurney-flap drag penalty with a dielectric barrier discharge (DBD) plasma actuator, which was mounted in front of the Gurney flap to generate a countercurrent wall jet. The research was based on numerical simulation, which was performed on a NACA 0012 airfoil with Gurney-flap heights (h) of 1, 2, and 3%c at Rc=6.84×105. According to the simulation results, the wall jet was able to decrease the additional drag on the Gurney flap by lowering the upstream pressure of the Gurney flap without disturbing the flow field downstream of the Gurney flap. The drag reduction effect was more obvious at low angles of attack and small Gurney-flap height, and a drag reduction of 15% was achieved at α=0° with 1%c flap height. This method also lowered total lift, but it was not strong enough to impair the high-lift property of the Gurney flap. For all tested Gurney-flap heights, the lift-drag ratios under low to moderate CL were enhanced by this approach. Comparing with the clean airfoil, a 12% increment of lift-drag ratio was obtained at cruise with plasma control at h/c=1% flap height.
    publisherAmerican Society of Civil Engineers
    titleGurney-Flap Drag Penalty Reduction with a DBD Plasma Actuator
    typeJournal Paper
    journal volume30
    journal issue5
    journal titleJournal of Aerospace Engineering
    identifier doi10.1061/(ASCE)AS.1943-5525.0000769
    treeJournal of Aerospace Engineering:;2017:;Volume ( 030 ):;issue: 005
    contenttypeFulltext
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    DSpace software copyright © 2002-2015  DuraSpace
    نرم افزار کتابخانه دیجیتال "دی اسپیس" فارسی شده توسط یابش برای کتابخانه های ایرانی | تماس با یابش
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