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首页> 外文期刊>Journal of the American Helicopter Society >Performance measurement and wake characteristics of a model rotor in axial flight
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Performance measurement and wake characteristics of a model rotor in axial flight

机译：模型转子在轴向飞行中的性能测量和尾流特性

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This paper studies the concept of extracting hover performance from model rotor climb data by extrapolating to the limit of zero climb speed. A 2-bladed rotor was mounted horizontally and tested in the 30' x 31' settling chamber of the Ames 7' x 10' #1 wind tunnel. The collective pitch and tunnel speed were varied. Video cameras were used to visualize the flowfield illumi- nated by pulsed white light sheets. Facility recirculation effects were eliminated at all but the lowest rates of climb. With a steady, non-recirculatory flow, the rotor wake was seen to be fully periodic, with little diffusion of he vortices for several rotor cycles.
机译：本文研究了通过外推到零爬升速度极限来从模型转子爬升数据中提取悬停性能的概念。将2叶片的转子水平安装并在Ames 7'x 10'＃1风洞的30'x 31'沉降室内进行测试。总体螺距和隧道速度各不相同。摄像机被用来可视化脉冲白光照射的流场。除最低爬升率外，几乎没有消除设施再循环的影响。有了稳定的非再循环流，转子尾流被认为是完全周期性的，在几个转子循环中涡流几乎没有扩散。

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