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首页> 外文期刊>Journal of the American Helicopter Society >Investigation of Rotor Performance and Loads of a UH-60A Individual Blade Control System
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Investigation of Rotor Performance and Loads of a UH-60A Individual Blade Control System

机译：UH-60A单叶片控制系统的转子性能和负载的研究

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摘要

Wind tunnel measurements of performance, loads, and vibration of a full-scale UH-60A Black Hawk main rotor with an individual blade control (IBC) system are compared with calculations obtained using the comprehensive helicopter analysis CAMRAD II and a coupled CAMRAD II/OVERFLOW 2 analysis. Measured data show a 5.1% rotor power reduction (8.6% rotor lift to effective-drag ratio increase) using 2/rev IBC actuation with 2.0° amplitude at μ = 0.4. At the optimum IBC phase for rotor performance, IBC actuator force (pitch link force) decreased, and neither flap nor chord bending moments changed significantly. CAMRAD II predicts the rotor power variations with the IBC phase reasonably well at μ = 0.35. However, the correlation degrades at μ = 0.4. Coupled CAMRAD II/OVERFLOW 2 shows excellent correlation with the measured rotor power variations with the IBC phase at both μ= 0.35 and μ= 0.4. Maximum reduction of IBC actuator force is better predicted with CAMRAD II, but general trends are better captured with the coupled analysis. The correlation of vibratory hub loads is generally poor by both methods, although the coupled analysis somewhat captures general trends.
机译：将带有独立叶片控制（IBC）系统的全尺寸UH-60A黑鹰主旋翼的风洞性能，载荷和振动测量与使用综合直升机分析CAMRAD II和CAMRAD II / OVERFLOW进行的计算进行比较2分析。测量数据显示，使用2 / rev IBC致动，振幅为2.0°，μ= 0.4时，转子功率降低了5.1％（转子升力对有效阻力比增加了8.6％）。在用于转子性能的最佳IBC相位下，IBC执行器力（俯仰连杆力）减小，襟翼和弦弯矩均无明显变化。 CAMRAD II预测在I = 0.35时，IBC相位的转子功率变化相当好。但是，相关性在μ= 0.4时降低。耦合的CAMRAD II /过流2与在μ= 0.35和μ= 0.4的IBC相位下测得的转子功率变化表现出极好的相关性。使用CAMRAD II可以更好地预测IBC执行机构力的最大降低，但是使用耦合分析可以更好地把握总体趋势。虽然这两种方法的耦合分析在一定程度上反映了总体趋势，但两种方法通常都缺乏振动毂载荷的相关性。

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