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Numerical Investigation on Performance and Environmental Impact of a compound wing in ground effect

机译：复合机翼地面效应性能与环境影响的数值研究

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摘要

The performance and environmental impact of a new compound wing were numerically investigated in proximity to the ground. The compound wing was divided into three parts where one rectangular wing in the middle and two reverse taper wings with anhedral angle on sides. Three dimensional (3D) computational fluid dynamics (CFD) was employed for numerical simulation. The k-ε turbulent model was applied for current flow over wing surface. The NACA6409 airfoil was used as a wing section. For validation propose, the drag coefficient and lift to drag ratio of a rectangular wing with respect to different aspect ratio, angle of attack, and ground clearance were compared to experimental data of other published work. The present numerical results show the drag coefficient of compound wings is smaller than drag coefficient of rectangular wing, also lift to drag ratio of compound wings has a considerable enhancement as compared to rectangular wing. In addition, the fuel consumption and CO2 emission related to use compound wings have sizeable decreasing compared to rectangular wing.
机译：在地面附近对新型复合机翼的性能和环境影响进行了数值研究。复合机翼分为三部分，中间是一个矩形翼，侧面是反角的两个反锥翼。三维（3D）计算流体动力学（CFD）用于数值模拟。 k-ε湍流模型用于机翼表面的电流流动。 NACA6409机翼用作机翼部分。为了进行验证，将矩形机翼相对于不同纵横比，迎角和离地间隙的阻力系数和升力/阻力比与其他已发表工作的实验数据进行了比较。数值结果表明，复合翼的阻力系数小于矩形翼的阻力系数，复合翼的升阻比与矩形翼相比也有较大提高。此外，与矩形机翼相比，与使用复合机翼有关的燃料消耗和CO2排放量有较大幅度的下降。

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