摘要
在１ｍ低速风洞中，研究了边条翼在过失速非定常流动控制后的空间流态。实验采用翼面吹气控制翼面非定常流动，通过烟流显示涡轨迹和涡破碎位置，用相锁照相技术记录空间流态。结论表明，在机翼上仰过程中，翼面吹气能延迟前缘涡的破碎，在机翼下俯过程中，吹气有利于前缘涡的生成和发展。
A flow visualization investigation on leading edge breakdown is conducted in a wind tunnel to identify the effect of blowing on a strake wing model undergoing large amplitude pitching motions. During these experiments, the visualization of the leading edge vortices is obtained by injecting smoke. The location of vortice breakdown is recorded by use of the phase locked photography technique. Results indicate that blowing delays the burst of leading edge vortices during pitching up and is favorable for producing and developing the leading edge vortices during pitching down.
出处
《南京航空航天大学学报》
EI
CAS
CSCD
北大核心
1997年第3期321-325,共5页
Journal of Nanjing University of Aeronautics & Astronautics
基金
国防预研基金
关键词
非定常
吹气
边条翼
涡破碎
机翼理论
翼面涡
unsteady aerodynamics
flow visualization
blowing
large angle of attack
strake wing
vortices breakdown
