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首页> 外文期刊>The Aeronautical Journal >Downstream evolution of wingtip vortices produced from an inverted wing
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Downstream evolution of wingtip vortices produced from an inverted wing

机译：反向机翼产生的翼尖涡流的下游演变

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摘要

Counter-rotating vortices form from the opposite edges of lifting surfaces, and gradually move laterally and dissipate as they travel downstream (as seen in a wing-fixed reference frame). Under ground effect conditions, the vortex from a lifting wing such as that used in an aircraft application moves laterally outboard from the wingtip as it progresses downstream; for a downforce wing in ground effect such as that used in an automotive application the vortex moves laterally inboard. An interesting case is the situation where the inboard moving vortices become in close proximity to each other. The objective of the present study was to investigate counter-rotating vortices produced from a low aspect ratio downforce wing operating in ground effect. The pair of vortices move towards each other and mutually induce an upwards directed motion which in turn reduces the inboard movement driven by the ground effect. Experimental data gained from three-dimensional Laser Doppler Anemometry in a moving ground wind-tunnel was used to validate a Large Eddy Simulation computational result.
机译：反向旋转的涡流从升力面的相对边缘形成，并逐渐向侧面移动并随着它们向下游移动而消散（如在固定翼的参考框架中看到的那样）。在地面效应条件下，来自升翼的涡流（如飞机应用中使用的涡流）随着其向下游前进而从翼尖横向向外移动。对于地面效应的下压力机翼（例如在汽车应用中使用的机翼），涡旋向内侧横向移动。一个有趣的情况是内侧运动的涡流彼此非常接近的情况。本研究的目的是研究由低纵横比的下压力机翼在地面作用下产生的反向旋涡。一对涡流彼此靠近并相互诱导向上运动，从而减少了地面效应驱动的内侧运动。从在移动地面风洞中的三维激光多普勒风速计获得的实验数据用于验证大涡模拟的计算结果。

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  • 来源
    《The Aeronautical Journal》 |2015年第1216期|747-763|共17页
  • 作者

    Barber T.; Kurts P.;

  • 作者单位

    Univ New S Wales, Sch Mech & Mfg Engn, Sydney, NSW, Australia;

    Univ New S Wales, Sch Mech & Mfg Engn, Sydney, NSW, Australia;

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