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作 者:马晓永[1] 苏继川[1] 钟世东[1] 黄勇[1] 张诣[1] MA Xiaoyong;SU Jichuan;ZHONG Shidong;HUANG Yong;ZHANG Yi(China Aerodynamics Research and Development Center,Mianyang 621000,China)
机构地区:[1]中国空气动力研究与发展中心,绵阳621000
出 处:《空气动力学学报》2020年第5期896-900,I0002,共6页Acta Aerodynamica Sinica
摘 要:飞翼布局具有较好的气动和隐身性能,但也存在航向稳定性缺失、航向操纵效能不足等先天缺点。针对一种小展弦比变体飞翼布局飞机,提出了多功能变体尾翼概念,可依据飞行和任务需求自适应改变飞机气动布局形式,以解决飞翼布局的横航向稳定性与控制问题,同时又兼顾全机的隐身特性。通过对多功能变体尾翼气动、隐身特性研究,以及风洞、微波暗室试验验证,表明该变体尾翼具有良好的气动-隐身综合性能。以马赫数0.9、迎角0°为例,尾翼打开45°后,偏航力矩系数对侧滑角导数值从-0.0001增大至0.0004,航向稳定性明显得到改善;马赫数0.9和2.0时,尾翼上反打开45°后,焦点分别后移1.0%和前移5.3%平均气动弦长;隐身特性方面,尾翼打开时隐身性能有所下降,尤其是对"垂直-垂直"极化影响较大,雷达散射面积峰值视角变宽,平均高出约5dB (X^Ku频段)。对于小展弦比变体飞翼布局方案,提出的多功能变体尾翼概念较好地解决了飞翼横航向稳定性及控制问题,具有一定的应用价值。Flying wing has good aerodynamic and stealthy performance with defects of incompetent lateral-directional stability and control.In this paper,a multifunctional morphing tail for low-aspect-ratio flying wing configuration is presented which can automatically change aerodynamic configuration based on flight and missions condition.According to the analysis of aerodynamic and stealthy performance,the results of wind tunnel test,and compact antenna test,it is shown that the multifunctional morphing tail fins significantly improves the lateral static stability of the flying-wing.The C_n~βincreased from-0.0001 to 0.0004 at Ma=0.9、α=0°with 45°opening tail fins.At Ma=0.9 and 2.0,the aerodynamic focus respectively moves backward 1.0%b_A and forward 5.3%b_A with 45°opening tail fins.The radar cross section(RCS)for scale model increases about 5 dBsm(X^Ku band),especialy for the vertical-vertical(VV)polarimetric scattering.The multifunctional morphing tail is useful for designing low-aspect-ratio flying wing configuration with lateral-directional stability and control.
分 类 号:V225[航空宇航科学与技术—飞行器设计] O355[理学—流体力学]
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