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采用新的氢气/空气总包化学反应模型,对二维圆柱连续爆轰流场的演化进行数值模拟,计算了当量比φ从0.4到2.0变化时对连续旋转爆轰的影响。计算结果表明:在此物理模型和初始条件下,当φ为0.4、0.6、0.8、1.8、2.0时不能形成连续旋转爆轰,当φ为1.0、1.2、1.4、1.6时能够形成稳定的连续旋转爆轰,这一结果与实验结果符合得很好;贫燃和富燃条件下不能形成连续旋转爆轰的机理是不同的。
A new hydrogen / air total chemical reaction model was used to simulate the evolution of a two-dimensional cylindrical continuous detonation flowfield. The influence of the equivalent ratio φ from 0.4 to 2.0 on the continuous rotary detonation was calculated. The calculation results show that continuous rotation detonation can not be formed when φ is 0.4,0.6,0.8,1.8,2.0 under this physical model and the initial conditions, and stable continuous rotation can be formed when φ is 1.0, 1.2, 1.4, 1.6 Detonation, which is in good agreement with the experimental results. The mechanism of continuous rotary detonation can not be formed under lean burn and rich combustion conditions.