摘要
笔者对75°/60°双三角翼模型进行了水洞流态观测实验、低速风洞测压实验、空间流场测量实验,研究了双三角翼外翼前缘钝度对气动特性影响,包括对涡态的影响。这里发表的是第一期实验的初步结果。结果表明,外翼前缘钝化使内翼涡涡核推迟破裂,外翼前缘钝化主要影响双三角翼前缘折点后的后半翼上表面的C_p分布,特别是在涡发生破裂后,其影响较大。
The vortex visualization and surface pressure distribution measurement for a 75°/60° double-delta wing were carried out in the water tunnel and in the low speed wind tunnel of BUAA. The inboard wing of models is sharp-edge and the outboard wing has both sharp and round leading-edge. The effect of outboard ledding-edge bluntness of double-delta wing and on its aerodynamical characteristics vortex patterns. Experiment results indicate that the bursting of inboard wing vortex is delayed,and the surface pressure distribution of the wing at downstrem of leading-edge kink is changed for the blunted leading edge case.
出处
《北京航空航天大学学报》
EI
CAS
CSCD
北大核心
1993年第1期56-62,共7页
Journal of Beijing University of Aeronautics and Astronautics
关键词
大迎角
分离流动
S形前缘翼
压强
high angle of attack,spearated flow,double-delta wing, pressure distribution, vortex characteristics.
