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.
出处
《航空计算技术》
2011年第1期78-81,共4页
Aeronautical Computing Technique
关键词
上翘机身后体
几何参数
压差阻力
upswept fuselage afterbody
geometry parameter
pressure drag
