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为了研究稀释气体Ar的浓度对爆震波从直管往分叉管绕射传播和对直管中爆震波传播的影响,采用三阶TVD迎风格式和Strang-splitting算子分裂法,对H2/O2/Ar混合物爆震燃烧进行了二维数值计算。计算结果表明:在298K,6670Pa初始条件下,四种组分比条件下,主爆震管下游由于分叉管绕射稀疏波的影响,都会产生不同程度的解耦,但是通过壁面马赫反射后,都能恢复平面爆震;在H2/O2/Ar体积比为2:1:7时,爆震波绕射进入分叉管后,爆震波解耦成爆燃火焰波;体积比为2:1:0,2:1:1和2:1:4条件下,水平爆震管中的爆震波,绕射进入垂直分叉管后,通过不同次数壁面马赫反射,能够二次起爆,解耦的爆震波恢复成为平面自持爆震波。
In order to study the effect of concentration of dilution gas Ar on detonation wave propagation from straight tube to divergent tube and propagation of detonation wave in straight tube, a third-order TVD upwind scheme and Strang-splitting operator splitting method were used to investigate the effect of H2 / O2 / Ar mixture knock combustion two-dimensional numerical calculation. The results show that there are some decoupling effects under the initial conditions of 298K and 6670Pa under the condition of four component ratios and the influence of the sparse wave diffracted by the bifurcated pipe downstream of the main detonation tube. However, , The plane detonation can be recovered; when the volume ratio of H2 / O2 / Ar is 2: 1: 7, the detonation wave is diffracted into the furcation tube and the detonation wave is decoupled into the deflagration flame wave; the volume ratio is 2: 1: 0, 2: 1: 1 and 2: 1: 4, the detonation wave in the horizontal detonation tube can be detonated twice after being diffracted into the vertical furcation tube by the Mach number of the different number of walls, and the detonation wave can be detonated Shock wave recovery as a flat self-sustaining detonation wave.