一种结冰外形相似度评估方法  

Quantitative method for ice accretions comparison

作　　者：周志宏[1,2] 易贤[2] 郭龙[2] 桂业伟[2] 郭民[2] 

机构地区：[1]四川大学工程力学系,四川成都610065 [2]中国空气动力研究与发展中心空气动力学国家重点实验室,四川绵阳621000

出　　处：《空气动力学学报》2016年第5期556-561,共6页Acta Aerodynamica Sinica

基　　金：国家自然基金(11172314;11472296);国家重点基础研究发展计划(2015CB755800)

摘　　要：针对现阶段飞机结冰研究中难以进行量化的冰形相似度对比这一问题,以冰对飞行器气动特性的影响为依据,提出了一种基于几何特征量、冰形差异率的冰形相似度量化评估方法,给出了这种评估方法中的各分量的具体物理含义和计算方法,并采用CFD手段分析了不同相似度的冰块对NACA0012翼型气动性能的影响,结果表明,相似度越大的冰,对飞行器的气动性能影响也就越相似,验证了该方法的正确性。The method of comparing the shape of the ice by the influence degree on the aerodynamic characteristics is proposed.The degree of similarity of ice shape is considered to be mainly depended on two variables,the first variable is the degree of similarity of the geometric characteristics of the ice shape,and the second the degree of difference between ice shapes.The method of ice shape similarity is verified by calculating the impact of different ice on the aircraft’s aerodynamic performance with CFD tools.The aerodynamic characteristics with different ice shapes for the NACA0012 airfoil are simulated and analyzed.The proposed method of ice shape similarity is verified,and influence degree of the aerodynamic characteristics is more closely when ice shapes are more similar.

关 键 词：飞机结冰 相似度 几何特征量 冰形差异率 计算流体力学 

分 类 号：V211.3[航空宇航科学与技术—航空宇航推进理论与工程]