放宽纵向静稳定性对战斗机布局升阻比特性的影响  

Effect of Relaxed Longitudinal Static Stability on Lift-to-Drag Ratio of Aircraft Configurations

作　　者：郑遂[1] 展京霞[2] 曹原[2] 昂海松[1] 

机构地区：[1]南京航空航天大学飞行器先进设计技术国防重点学科实验室,南京210016 [2]成都飞机设计研究所,成都610041

出　　处：《南京航空航天大学学报》2008年第4期556-560,共5页Journal of Nanjing University of Aeronautics & Astronautics

摘　　要：就放宽纵向静稳定性技术对不同战斗机布局升阻比特性的影响进行了研究。文中选取鸭式和正常式两种典型的现代战斗机布局,基于风洞试验数据,获得了在5种典型情况下,飞机不采用和采用放宽纵向静稳定性技术时的配平升阻比特性,并且分析了两种布局配平升阻比特性不同的原因。研究结果表明:在典型的亚、跨和超声速马赫数下,如果不采用放宽纵向静稳定性技术,鸭式布局由于配平得到的升阻比收益一般低于常规布局的收益;鸭式布局由于采用放宽纵向静稳定性技术得到的配平升阻比收益明显高于常规布局。从配平升阻比特性的角度来看,鸭式布局比常规布局更加适于采用放宽纵向静稳定性技术。The effect of relaxed longitudinal static stability on the characteristics of lift-to-drag ratio of canard and conventional configurations is investigated. Based on the data of the wind-tunnel tests, the characteristics of the trimmed lift-to-drag ratio are obtained in five typical flight cases, when the differ- ent configurations are designed with relaxed or unrelaxed longitudinal static stability. The research results show that, at the typical subsonic, transonic and supersonic Math numbers, the canard configuration has lower increment of lift-to-drag ratio due to trim than that of the conventional configuration when these two configurations don＇t adopt the technique of the relaxed longitudinal static stability. However, when these two configurations possess the relaxed longitudinal static stability, the canard configuration increment of trimmed lift-to-drag ratio is higher than that of the conventional configuration. Therefore, by the trimmed lift-to-drag ratio, the technique of the relaxed longitudinal static stabil- ity is more appropriate for canard configuration than for conventional configuration. The reason for the conclusion is presented as well.

关 键 词：纵向静稳定性 升阻比 鸭式布局 配平 

分 类 号：V212.12[航空宇航科学与技术—航空宇航推进理论与工程] V221.3