摘要
增升装置的气动效率对于全机整体性能有重要影响,而当代大多数跨音速运输类飞机均采用翼吊发动机布局。通过对有、无翼吊短舱的两个三维增升装置的数值模拟,研究了翼吊发动机短舱对于增升装置气动性能的影响。结果表明,翼吊发动机短舱会严重恶化增升装置的气动性能。流动机理分析表明,短舱挂架与机翼前缘结合处的缝翼缺口及大迎角时绕过短舱的分离气流是造成增升装置气动性能恶化的两个主要原因。
The aerodynamic efficient of high-lift system has a sufficient impact on the performance of a plane.And most transonic transport airplanes are wing-mounted engine configurations.This paper investigated the Influence of wing-mounted engine nacelle on aerodynamic performance of high-lift system by numerical simulations about two three-dimensional high-lift systems,one has a wing-mounted engine nacelle and the other doesn′t.The result indicated that wing-mounted engine has serious negative influence on the aerodynamic performance of three-dimensional high-lift system.According to flow mechanism analysis,this paper concluded that slat cut-out and separation flows around nacelle at high angles of attack are the two main reasons that hurt aerodynamic performance of high-lift system.
出处
《航空计算技术》
2010年第6期86-89,共4页
Aeronautical Computing Technique
关键词
翼吊短舱
三维增升装置
流动滞止
数值模拟
wing-mounted engine nacelle
three-dimensional high-lift system
flow stagnation
numerical simulation
