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Gurney-Flap Drag Penalty Reduction with a DBD Plasma Actuator

机译：带DBD等离子执行器的格尼襟翼阻力降低

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摘要

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 R-c = 6.84 x 10(5). 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 alpha = 0 degrees 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. (C) 2017 American Society of Civil Engineers.
机译：本研究提出了一种使用介电势垒放电（DBD）等离子体致动器来降低格尼襟翼阻力的方法，该致动器安装在格尼襟翼的前面以产生逆流壁射流。该研究基于数值模拟，该数值模拟是在R-c = 6.84 x 10（5）时，格尼襟翼高度（h）为1、2和3％c的NACA 0012机翼上进行的。根据模拟结果，壁式射流能够通过降低格尼襟翼的上游压力来减少格尼襟翼上的附加阻力，而不会干扰格尼襟翼下游的流场。在低攻角和小格尼襟翼高度的情况下，减阻效果更加明显，在α= 0度和c襟翼高度为1％时，减阻效果达到15％。这种方法也降低了总升力，但强度不足以损害格尼襟翼的高升力特性。对于所有测试的格尼襟翼高度，通过这种方法可以提高低至中度CL下的升力-阻力比。与干净的机翼相比，在等离子控制下巡航时，h / c = 1％襟翼高度时，升阻比提高了12％。 （C）2017年美国土木工程师学会。

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  • 来源
    《Journal of aerospace engineering》 |2017年第5期|04017060.1-04017060.12|共12页
  • 作者

    Zhang Zeng; Feng Lihao; Wang Jinjun; Liu Peiqing;

  • 作者单位

    Beihang Univ, Sch Adv Engn, Beijing 100191, Peoples R China;

    Beihang Univ, Educ Minist, Fluid Mech Key Lab, Inst Fluid Mech, Beijing 100191, Peoples R China;

    Beihang Univ, Educ Minist, Fluid Mech Key Lab, Inst Fluid Mech, Beijing 100191, Peoples R China;

    Beihang Univ, Educ Minist, Fluid Mech Key Lab, Inst Fluid Mech, Beijing 100191, Peoples R China;

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