Abstract

A supersonic flow in a channel with a variable cross section is numerically simulated in the case of ethylene injection along the channel under the action of a jet generating a throttling effect. The averaged Navier–Stokes equations closed by the \(k\)–\(\varepsilon\) turbulence model are solved. Ethylene combustion is modeled with the use of one reaction. The results are compared with experimental data on the pressure distribution over the channel wall. It is found that gas-dynamic pulses produce an irreversible effect on the flow structure. The formation of a transonic flow region and its structure are described.

中文翻译：

---

利用气动力脉冲控制乙烯燃烧过程中的超音速流动结构

摘要

在具有节流效果的射流的作用下沿通道注入乙烯的情况下，对具有可变横截面的通道中的超音速流动进行了数值模拟。由\（k \） – \（\ varepsilon \）湍流模型封闭的平均Navier–Stokes方程被求解。乙烯燃烧是通过使用一个反应进行建模的。将结果与通道壁上压力分布的实验数据进行比较。发现气动脉冲对流动结构产生不可逆的影响。描述了跨音速流动区的形成及其结构。