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本文采用联立求解粘性剪切层和有旋无粘区的方法计算了再入钝头体层流近尾流场。有旋无粘区采用有旋特征线法计算。粘性剪切层采用改进的流管法计算，这两个区域间的基本流线上的压力、温度、速度等由两个区域迭代匹配确定，粘性剪切层的下边界区分流线采用实验确定，回避了回流区复杂计算，计算结果与有关试验和文献一致。本文的目的是提供远尾流计算所需的颈部初始剖面。
In this paper, the method of simultaneous solution of viscous shear layer and spin-free zone was used to calculate the near-end flow field of blunt body re-entry. Spiral non-sticky area spin method using the characteristic line method. The viscous shear layer is calculated using an improved flow tube method. The pressure, temperature, velocity, etc. on the basic flow lines between the two regions are determined iteratively by two regions. The lower boundary of the viscous shear layer is determined experimentally , To avoid the complex calculation of the reflow zone, the calculation results and the relevant tests and literature. The purpose of this paper is to provide the initial section of the neck necessary for the calculation of the distal wake.