摘要
水滴直径是影响水滴撞击特性的重要参数,而撞击特性在很大程度上影响结冰冰形,因此,在结冰数值模拟中,如何合理选取水滴分布模型,对于保证计算精度有重要意义。本文基于求解雷诺时均N-S方程获得的流场结果,采用拉格朗日法计算水滴撞击特性,并采用Messinger模型进行结冰增长模拟,研究了水滴直径、水滴多尺寸分布对水滴撞击特性和结冰冰形的影响。结果表明,水滴的多尺寸分布对于结冰数值模拟结果具有重要影响,采用Langmuir D分布能够满足数值模拟精度要求。
The effects of droplet diameter on droplet impingement characteristics for determining the ice shape are essential.Therefore,it needs to be considered during aircraft icing numerical simulation.The reasonable droplet distribution is important to ensure the accuracy of numerical simulation.Based on the flow field calculated by solving N-S equations,droplet trajectories in Lagrangian method and ice accretion using Messinger model are obtained and the effects of different droplet distributions on icing numerical simulation are studied.The result shows that these effects cannot be ignored.And using Langmuir D to describe the practical droplet distribution can satisfy the accuracy needs.
出处
《南京航空航天大学学报》
EI
CAS
CSCD
北大核心
2010年第5期620-624,共5页
Journal of Nanjing University of Aeronautics & Astronautics
关键词
数值模拟
飞机结冰
水滴撞击特性
多尺寸分布
冰形
numerical simulation
aircraft icing
droplet impingement characteristics
multi-dispersed distribution
ice shape
