The Effect of Tip Clearance on Low Reynolds Number Rotating Wings
The Effect of Tip Clearance on Low Reynolds Number Rotating Wings
复制标题
叶尖间隙对低雷诺数旋转翼的影响
DOI：
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发表时间：
2014
期刊：
影响因子：
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通讯作者：
Anya R. Jones
中科院分区：
文献类型：
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作者：
F. Manar;Anya R. Jones
在充液罐中的旋转机翼上进行了实验，以确定产生不受壁面影响的数据所需的最小尖端间隙。在雷诺数为120-10000的情况下，攻角为45度的旋转翼旋转了两圈。通过改变机翼尺寸，叶尖间隙从0.5弦变化到7弦。获得了作用力数据和染料流动显示。结果表明，在所有测试的雷诺数下，5和7弦间隙情况下，0.5弦间隙情况下有较大的尖端效应，没有壁面效应。在三弦间隙情况下，当雷诺数小于1000时，第一转时没有壁面效应，而在较大雷诺数和冲程幅值时，壁面效应较小。对于雷诺数为10000及以下、行程幅度不超过两转的实验而言，5根弦的尖端间隙被认为是没有壁面效应的。
Experiments were conducted on a rotating wing in a fluid-filled tank to determine the minimum required tip clearance to produce data free from wall effects. A rotating wing at an angle of attack of 45 degrees was revolved for two revolutions at Reynolds numbers between 120 and 10000. Tip clearance was varied from 0.5 chords to 7 chords by changing wing size. Force data and dye flow visualization were acquired. Results show large tip effects for 0.5 chords of clearance and no wall effects for 5 and 7 chord clearance cases at all Reynolds numbers tested. The 3 chord clearance case showed no wall effects for Reynolds numbers of less than 1000 in the first revolution, and minor wall effects for greater Reynolds number and stroke amplitudes. A tip clearance of 5 chords is deemed to be free of wall effects for experiments at Reynolds numbers of 10000 and below and for stroke amplitudes of no more than two revolutions.