本文是在文献的试验基础上,分析了J6Ⅲ系列进气道唇口几何形状和唇口气流分离的关系.文中分析了唇口三个几何参数:收缩比,椭圆长短轴比及超越椭圆指数n对气流分离区大小的影响。并提出只要此三个唇口几何参数组合得好,即使喉道M数较高,述是可以得到无分离的气流。 In this paper, based on the experiments in the literature, the relationship between lip geometry and lip airflow separation of J6Ⅲ series inlet ports is analyzed.The three geometrical parameters of lip lip, such as shrinkage ratio, ratio of axial length to elliptical length and transcendental elliptic index n Impact on the size of airflow separation zone. And proposed that as long as the geometrical parameters of these three lip combinations are well combined, even if the number of throat M is high, it is possible to obtain the undivided airflow.