摘要
利用CFD的方法,对某民机进行短舱安装位置的优化分析。在对全机进行粘性绕流数值模拟的基础上,分析了前伸量和下沉量变化对机翼附近流场的干扰以及对全机气动性能的影响。短舱安装位置的优化选择在以巡航状态高升阻比为主要目标的同时,兼顾低速状态气动特性,分析计算了短舱位置变化对低速翼面流动分离特征的影响。计算分析结果表明:在所选的状态内,短舱前移和下移会降低高速状态的干扰阻力,并增加低速状态内侧翼面分离趋势,得出的规律性结论对工程应用具有一定的指导意义。
In this work,CFD tools are used to analyze the nacelles position of the the civil aircraft.After calculating the flow fields of the civil aircraft with nacelles of different position,we analyze the interference between wings and nacelle-pylon boundary layer resulting from the nacelle position,which is changed both horizontally and vertically.In this process,both the flow separation property on the wing in low-speed condition and the lift-drag ratio in cruise condition are researched.Finally,the relation between the nacelle position and the aircraft aerodynamic characteristic is obtained.
出处
《应用力学学报》
CAS
CSCD
北大核心
2011年第4期366-371,451,共6页
Chinese Journal of Applied Mechanics
基金
国家自然科学基金(90816027
10772148)
关键词
短舱位置
干扰阻力
翼面分离
升阻特性
nacelle position,interference drag,flow separation on the wing,lift-drag ratio
