Interaction effects on the conversion corridor of tiltrotor aircraft
Interaction effects on the conversion corridor of tiltrotor aircraft
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DOI：
10.1017/aer.2021.33
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发表时间：
2021-05
期刊：
影响因子：
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通讯作者：
W. Appleton;A. Filippone;N. Bojdo
中科院分区：
文献类型：
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作者：
W. Appleton;A. Filippone;N. Bojdo
本文介绍了倾转旋翼机在转换飞行状态下的空气动力学研究。对旋翼-机翼、旋翼-尾翼和机翼-尾翼相互作用的影响进行了单独和集体研究，以评估它们对配平特性、性能和转换边界的影响。旋翼在翼上的下载被认为是占主导地位的悬停和低速飞行性能的预测，并有一个整体的降级效果。机身俯仰姿态和驾驶杆位置被发现是显着影响的尾翼相互作用的情况下，整个转换域。用于减轻旋翼下载的大襟翼/襟副翼设置对低速配平性能有相当大的贡献。转换边界对所有干扰情况都不敏感，尽管最小速度边界由于机翼-尾翼干扰而略微减小。结果表明，组合干扰是精确预测整个转换走廊内配平特性和飞机性能的重要因素。
Abstract This paper presents an aeromechanics investigation of tiltrotor aircraft through the conversion regime of flight. The effects of the rotors-on-wing, rotors-on-empennage and wing-on-empennage interactions were investigated singularly and collectively to assess their impacts on trim behaviour, performance and conversion boundaries. The rotors-on-wing download was found to be dominant in the prediction of hover and low-speed flight performance and had a degrading effect overall. The fuselage pitch attitude and stick position were found to be significantly affected by the empennage interaction cases throughout the conversion domain. The large flap/flaperon settings used to alleviate the rotor download contributed considerably to the low-speed trim behaviour. The conversion boundaries were found to be insensitive to all the interaction cases, though the min-speed boundary was reduced marginally due to the wing-on-empennage interaction. The results showed that the combined interactions were important factors to accurately predict the trim behaviour and aircraft performance throughout the conversion corridor.