观察从在哪儿的实验和计算被介绍 laminar 球形的 CH 4/air 火焰被事件连续地使不安并且反映了冲击波。实验在标准吃惊试管安排,一个高速度的影相成像系统在被用来记录火焰的进化被执行。数字模拟被使用秒顺序波浪繁殖算法进行,基于二维的 axisymmetric Navier 司烧有详细化学反应的方程。质的协议在试验性、数字的结果之间被获得。在事件冲击波的行动下面,为火焰变丑负责的 Richtmyer Meshkov 不稳定性在火焰被导致,并且弄歪的火焰拿桶形状。在从一面平面墙反映的冲击波的随后的行动下面,然后,火焰在对称的生气的节拿使倾向的非对称的肾形状,它意味着火焰的像蘑菇的形状最后来进是。在戒指帽子的涡度方向被反映的吃惊的行动改变了,它做像蘑菇的火焰的头快速延长到方面墙。
Observations are presented from experiments and calculations where a laminar spherical CH4/air flame is perturbed successively by incident and reflected shock waves. The experiments are performed in a standard shock tube arrangement, in which a high-speed shadowgraph imaging system is used to record evolutions of the flame. Numerical simulations are conducted by using second-order wave propagation algorithms, based on two-dimensional axisymmetric Navier-Stokes equations with detailed chemical reactions. Qualitative agreements are obtained between the experimental and numerical results. Under actions of incident shock waves, Richtmyer-Meshkov instability responsible for the flame deformation is induced in the flame, and the distoned flame takes a barrel shape. Then, under subsequent actions of the shock wave reflected from a planar wall, the flame takes an inclined non-symmetrical kidney shape in a symmetric cross section, which means a mushroom-like shape of the flame comes finally into being. The vorticity direction in the ring cap has been altered by the reflected shock's action, which makes the head of the mushroom-like flame extend quickly to the side wall.