机身后体气动特性及其张线支撑影响研究  

THE STUDY OF AERODYNAMIC CHARACTERISTICS OF AFTERBODY AND EFFECT OF CABLE-MOUNTING

作　　者：王延奎[1] 黄涛[1] 邓学蓥[1] 

机构地区：[1]北京航空航天大学流体力学研究所,北京100083

出　　处：《力学学报》2004年第3期257-264,共8页Chinese Journal of Theoretical and Applied Mechanics

基　　金：航空科学基金资助项目(01A51082)~~

摘　　要：以民用机后体为对象,对四线、六线和八线3种张线布局对后体分离流型、旋涡结构及气动特性的影响进行了研究,实验是在北航D-1风洞中进行的,实验ReD=2.148×105.实验研究表明:随迎角从-10°增加到20°,收缩上翘民用机后体的绕流涡系由下涡系转变为上涡系,直到多涡系结构,相应的分离流态由上分离流型转变为下分离流型;张线对机身后体绕流流场的影响一方面通过对绕流旋涡的干扰起作用,张线尾迹区的低能流会降低绕流旋涡对机身表面的诱导作用,采用1 mm张线,对于四线、六线和八线3种支撑型式,机身后体分离流型及旋涡结构未发生明显改变.The purpose of this paper is to study the effect of cable-mounting on flow over an afterbody of a aircraft. The experimental results show that: (1) the flow patterns over afterbody can be divided into upper-separated, non-separated and under-separated type; (2) the cable influences the aerodynamic characteristics of the model by affecting the vortex structure over it; (3) the basic flow patterns over afterbody have not been changed evidently by any of these three types of cable-mounting configuration.

关 键 词：张线支撑 气动特性 空气动力学 旋涡结构 分离流态 

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]