摘要
采用CFD数值计算的方法,对翼吊发动机长涵道短舱相对于机翼的前伸量和下沉量进行优化分析。分析了发动机短舱不同前伸量、下沉量时,飞机在高速巡航状态的干扰阻力和升力损失,以及满足低速平飞最小可用升力下,大迎角状态的失速特性,并计算分析了马赫数对优化结果的影响。计算结果表明,前伸量X/C=0.1时,干扰阻力及升力损失较小;下沉量变化5%的短舱最大直径时,仅引起不到1个阻力单元的变化;前伸量及下沉量的优化结果,不会随飞机巡航马赫数的变化而产生不同结论。
The CFD numerical calculation method is used to optimize protrusion and sinkage of underwing long ducted nacelle.The interference resistance of high-speed cruise and stall characteristics of low-speed high angle of attack were compared when different protrusion and sinkage.The influence of Ma on the optimization results is nanlyzed.The calculated results shows:The interference resistance and the lost lift force is small when X/C=0.1,The maximum diameter of the chamber is 5%,which results in less than 1 resistance unit.
作者
陈耿
CHEN Geng(Xi’an Aircraft Industry Group Company Ltd.Xi’an 710089,China)
出处
《飞机设计》
2021年第1期16-20,共5页
Aircraft Design
关键词
前伸量
下沉量
干扰阻力
负压峰值
失速特性
the amount of protrusion
the amount of sinkage
interference resistance
peak negative pressure
stall characteristics
