降雨对飞机纵向飞行品质的量化影响  

Quantified effects of rain on aircraft longitudinal flying qualities

作　　者：黄成涛[1] 王立新[1] 

机构地区：[1]北京航空航天大学航空科学与工程学院,北京100191

出　　处：《飞行力学》2010年第1期5-8,共4页Flight Dynamics

基　　金：国家自然科学基金资助(60879004)

摘　　要：提出了一种根据降雨条件、飞机特征和飞行状态计算雨滴撞击飞机产生附加作用力和力矩的方法,研究了降雨对飞机气动特性的影响,建立并线化分析了降雨气象条件下飞机的运动数学模型。在此基础上,以波音747为例,进一步研究了不同强度降雨对飞机纵向飞行品质的影响。结果表明,降雨将导致飞机的短周期模态特性变差,长周期模态阻尼比略有增加,降雨率较大时,飞机的纵向飞行品质等级降低。A method to compute the force and moment generated by raindrops was provided. The longitudinal aerodynamic penalties due to rainfalls were studied. And the aircraft flight dynamic model in the rainfalls was linearized and analyzed. Then the aircraft longitudinal flying qualities in different rainfall rates were investigated based on the linear equations. The study shows that the characteristics of the short-period mode of aircraft would become worse in the rainfalls. The phugoid mode would be improved by the increasing damping due to the rainfalls. In severe rain, the scale of the longitudinal flying qualities would be degraded.

关 键 词：降雨 雨滴撞击力 气动特性 飞行品质 

分 类 号：V212.1[航空宇航科学与技术—航空宇航推进理论与工程]