运输机大上翘机身后体参数影响研究  

Research on Parameters Influence of Fuselage Afterbody with Large Upswept Angle of Transport Aircraft

作　　者：毛旭明[1] 张彬乾[1] 王元元[1] 

机构地区：[1]西北工业大学航空学院,陕西西安710072

出　　处：《航空计算技术》2011年第1期78-81,共4页Aeronautical Computing Technique

摘　　要：采用CFD方法研究了外形差异较大的三种大上翘后体机身的阻力与流动特性,分析了不同后体形状及几何参数的影响。压差阻力虽仅占机身总阻力的15~20%,但却决定总阻力的大小。在上翘角和长细比接近的情况下,扁平度是影响流动分离和压差阻力的主要因素。给出了后体设计的参数选择及应采取措施。In this paper,three distinct typical transport fuselage afterbodies with large upswept angle are investigated by Computational Fluid Dunamics（CFD）,in order to study effects of different shapes and geometry parameters of afterbodies on drag and flow performance.Though pressure drag accounts for 15 to 20 percent of total drag of afterbody,it decides the quantum of total drag.Under the condition of approximate upswept angle and fineness ratio,flat ratio is the main factor which effects the flow separation and pressure drag.It also gives some suggestions for parameters selection and measures to be taken in afterbody design.

关 键 词：上翘机身后体 几何参数 压差阻力 

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]