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首页> 外文期刊>JSME International Journal. Series B, Fluids and Thermal Engineering >Management of a Plane Turbulent Wall Jet by the Large-Eddy Break-up Device
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Management of a Plane Turbulent Wall Jet by the Large-Eddy Break-up Device

机译：大型涡流破碎装置对平面湍流壁射流的管理

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摘要

A Large Eddy Break-up (LEBU) device was applied to the flow management of a plane turbulent wall jet. The LEBU device was positioned at three different distances from the wall and the mean velocity, Reynolds shear stress profiles and wall shear stress were measured. The experimental data show that the LEBU device reduces the thickness of the shear layer and the magnitude of the Reynolds shear stress. The wall shear stress tends to be reduced even if the LEBU device is placed in the outer layer. These effects are most significant when the LEBU device is placed at the height at which the turbulent production term reaches its maximum. The length scale of the large eddies is reduced in manipulated flows, particularly in the spanwise direction.
机译：将大型涡流破碎（LEBU）设备应用于飞机湍流壁射流的流量管理。将LEBU设备放置在距墙壁三个不同的距离处，并测量平均速度，雷诺剪切应力曲线和壁切应力。实验数据表明，LEBU装置可减小剪切层的厚度并减小雷诺剪切应力的大小。即使将LEBU装置放置在外层中，壁面剪应力也趋于减小。当将LEBU设备放置在湍流产生项达到最大值的高度时，这些影响最为明显。大涡流的长度比例在操纵流中减小，尤其是在翼展方向上。

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