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首页> 外文期刊>Proceedings of the Institution of Mechanical Engineers >Numerical investigation of plasma actuated and non-actuated Gurney flaps on aerodynamic characteristics of a plunging airfoil
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Numerical investigation of plasma actuated and non-actuated Gurney flaps on aerodynamic characteristics of a plunging airfoil

机译：等离子体驱动和非驱动格尼襟翼对下降的翼型气动特性的数值研究

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摘要

Two-dimensional laminar incompressible flow around a National Advisory Committee for Aeronautics 0012 plunging airfoil with different Gurney flap heights of 2% C, 5% C, and 7% C and the oscillation amplitude of h=0.12C and frequencies of =1.3 and 4.67rad/s at Re=1850 is carried out in this paper. In addition to the Gurney flap, in order to control the flow over the airfoil, dielectric-barrier discharge plasma actuator is attached to the flap and its impact is investigated on the aerodynamic coefficients. Flow field and aerodynamic characteristics are compared with the clean plunging airfoil. For the Plasma force considered in this study, the 2% C Gurney flap height lead to a more enhancement in the lift curve. The results indicate that at all actuated and non-actuated Gurney flap heights the thrust is reduced. Furthermore, it is observed that by using plasma force at lower frequencies, CL is proportional to the square root of the Gurney flap height while at higher frequencies, plasma actuation inverses this proportion. Also, it can be concluded that the proportionality factor increases with increasing the frequency for both lifts and drags coefficients.
机译：国家航空咨询委员会0012围绕着不同格尼襟翼高度分别为2％C，5％C和7％C且振幅为h = 0.12C和频率= 1.3和4.67的翼型的二维层流不可压缩流本文对Re = 1850进行了rad / s的计算。除了格尼襟翼之外，为了控制流过机翼的气流，将介质阻挡放电等离子体致动器安装在襟翼上，并研究了其对空气动力学系数的影响。将流场和空气动力特性与干净的插入式翼型进行了比较。对于本研究中考虑的等离子力，2％的格尼襟翼高度会导致升力曲线进一步增强。结果表明，在所有作动和非作动的格尼襟翼高度上，推力均减小。此外，可以观察到，通过在较低频率下使用等离子力，CL与格尼襟翼高度的平方根成比例，而在较高频率下，等离子驱动力则与此比例成反比。同样，可以得出结论，比例系数随着升力和阻力系数的频率增加而增加。

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