后掠翼对细长体中段大迎角绕流的影响

采用在细长体顶点处添加扰动块的方式使细长体的绕流具有确定性.研究了在大迎角下,后 掠翼对细长体绕流结构和气动力特性的影响.实验结果表明,在30°迎角时,细长体中段背 风侧的流动和压力分布受到后掠翼与头部背涡的双重控制.在迎角α=40°~60°范围内 , 后掠翼对细长体中段绕流起主控作用,使细长体中段背风侧流动呈现完全分离流状态,使得 中段背风侧的压力分布保持为均值.

Influence on flow around mid-part of slender at high AOA by sweep wing

The flow around a slender was fixed in this way which a tiny pert urbation was located on the nose of the slender. The influence on flow str u cture and aerodynamic of a slender by sweep wing at high angle of attack was studied. The experimental results indicate that at angle of attack 30°,the fl ow and pressure distribution of mid-part leeside of a slender are dominated by sweep wing and forebody vortices. At angles of attack α=40°~60°, sweep wing dominates the flow around the mid-part of a slender only, and the flow of mid-p art leeside of a slender becomes full separate flow, the pressure distribution o f mid-part leeside of a slender retains constant.