摘要
基于带化学反应的三维Euler方程,采用氢气-空气的9组分19步基元反应简化模型,对圆环形燃烧室内的旋转爆轰进行了数值模拟。数值计算采用二阶精度波传播算法和二阶Runge-Kutta时间分步算法。通过数值计算得出爆轰波传播扫描照片,与相关文献中通过高速扫描照相机得到的扫描照片相比符合的很好,并详细描述了连续旋转爆轰波的三维流场及传播特性。数值结果表明,爆轰波能够以旋转方式沿预混气层稳定传播。在侧向稀疏波和前一次爆轰产物的共同影响下,二次爆轰波形成爆轰亏损。
The rotating detonation in a circular combustion chamber was numerically simulated by using a simplified 9-species,19-step reaction model based on the three-dimensional Euler equations with chemical reaction.The numerical calculation method used is based on a second-order spatially wave propagation algorithm and a two-step Runge-Kutta time marching algorithm.The calculated streak picture is in qualitative agreement with the picture recorded by a high speed streak camera.The three dimensional flowfields induced by a continuous rotating detonation and the distinctive features of the rotating detonations were described in detail.The calculated result shows that the detonation wave can rotationally propagate along the combustible mixture layer,and the lateral rarefaction waves from the air and the previous detonation product lead to the detonation deficit.
出处
《兵工学报》
EI
CAS
CSCD
北大核心
2012年第5期594-599,共6页
Acta Armamentarii
基金
国家自然科学基金项目(10872096)
关键词
爆炸力学
连续旋转爆轰
爆轰波-激波复合波
爆轰亏损
mechanics of explosion
continuous rotating detonation
detonation-shock composite wave
detonation deficit
