喷嘴自由射流的流态分为收缩段、密实段、掺混段和分散段四部分。

The free spray stream state of the efflux nozzle is divided into four sections -contract, dense, mixing and dispersion section.

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通过数值计算，得到了喷嘴出口自由射流与冲击射流情况下的流体速度、压力等参数分布情况，及这两种流场中的激波位置。

Through the numerical simulation, the distribution of those parameters such as speed, pressure of the free jet and impinging jet flow is obtained, also the position of shocks.

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