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本文应用ＶｏｎＭｉｓｅｓ变换对轴对称射流的各控制方程和相应的初始条件及边界条件进行了变换，选用普朗特混合长度湍流模型，用隐式有限差分格式进行数值求解，成功地计算了某型飞机在巡航状态下燃气由轴对称收缩喷管排入亚音速空气流中的速度场、温度场、浓度场、密度场以及燃气各组分的成分分布。计算结果可以用于预测飞机尾喷管高温燃气射流的红外辐射特性。
In this paper, Von Mises transform is used to transform the governing equations and the corresponding initial conditions and boundary conditions of the axisymmetric jets. Using the Prandtl mixed-length turbulence model, the implicit finite difference scheme is used to solve the problem numerically. Under cruising condition, the velocity of gas, temperature field, concentration field, density field and composition of gas components discharged into the subsonic airflow by gas are symmetrical. The calculation results can be used to predict the infrared radiation characteristics of the high temperature gas jet of aircraft nozzle.