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本文对进气道的尾涡进行了定量的实验研究。试验在美国麻省理工学院莱特兄弟风洞中进行。进气道气流速度与风速之比为22。用五孔探针详细地测量了沿两个矩形回路的气流速度向量以获得速度环量。所得的结果表明沿回路的角度分布与速度分布是合理的。并由此得到了环量(为1.39米~2/秒)和涡心的位置。由两回路的大小以及[3]中的压力分布推断尾涡系具有片状结构,但大部份涡度则集中在尾涡涡核附近。这样就直接地确切地证明了进口涡-尾涡体系的存在,并为定量地证明进口涡尾涡系形成的机理提供了有力的依据。
In this paper, a quantitative experimental study of the wake vortex of the inlet is carried out. The experiment was conducted at the Wright Brothers Wind Tunnel at the Massachusetts Institute of Technology. Intake air velocity and wind speed ratio of 22. The five-hole probe was used to measure the airflow velocity vector along the two rectangular loops in detail to obtain the velocity loop. The results obtained show that the angular distribution along the circuit and speed distribution is reasonable. And thus obtained the ring volume (1.39 m ~ 2 / sec) and the location of the vortex center. According to the size of the two loops and the pressure distribution in [3], it is deduced that the wake vortex has a lamellar structure, but most of the vorticity is concentrated in the wake vortex nucleus. In this way, the existence of inlet vortex - wake vortex system is proved directly and exactly, which provides a strong basis for quantitatively proving the formation mechanism of inlet vortex vortex system.