旋转爆轰流场的数值模拟

基于带化学反应的二维Euler方程,采用氢气-空气的9组分19步基元反应简化模型,对充有当量比的氢气-空气预混气和空气的环形旋转爆轰流场,从点火燃烧到发展成旋转爆轰的过程进行了数值模拟。根据数值结果分析了波后流场中爆轰产物受激波、高温和离心力等作用而挤向外壁,形成有利于充入燃料,实现持续稳定旋转爆轰的流场特征。还讨论流场中爆轰波、激波与间断面和内外壁面反射或折射,从而形成多个激波相交的波系特征。为认识和理解旋转爆轰流场,开展旋转爆轰的实验研究等具有现实的指导意义。

Numerical investigation on the flow field of rotating detonation wave

The circle rotating detonation flow field filled with hydrogen-air is simulated numerically,based on multi-component two-dimensional Euler equation.From the numerical results,it is demonstrated that the detonation product is accelerated towards the outside wall because of the effects of the shock wave,high temperature and centripetal forces,etc.and the flow field characteristic for filling fuel easily is formed to produce the steady rotating detonation.The reflection and refraction of the detonation and shock waves on the interface and walls are also discussed.It is of practical importance for understanding the rotating detonation flowfield and carrying on the experimental study.