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为研究两级脉冲爆震发动机环形喷口导流环的深度与角度对共振腔内激波聚焦起爆爆震波的影响,以氢气和空气混合物为例,对不同导流环深度和角度下激波聚焦起爆爆震波的过程进行了数值模拟。结果表明,导流环越深,起爆点的压力和温度越高,越有利于起爆;在导流环角度较小的情况下,导流环越深,工作频率越低,单位时间内整个装置的净冲量越小;在导流环角度较大的情况下,导流环越深,工作频率越高,单位时间内整个装置的净冲量越大;此外,随着导流环倾斜角的增大,起爆点温度和压力先升高后降低,在倾斜角为25°左右达到最大值,且起爆时刻提前,工作频率提高,单位时间内整个装置的净冲量也增大。
In order to study the influence of the depth and the angle of the ring-shaped annular guide flow guide ring on the detonation wave in the cavity of a two-stage pulse detonation engine, taking the mixture of hydrogen and air as an example, The detonation wave initiation process was numerically simulated. The results show that the deeper the guide ring, the higher the pressure and temperature of the detonation point, the more conducive to detonation; the smaller the angle of the diversion ring, the deeper the guide ring, the lower the operating frequency, the unit within the unit time Of the net impulse is smaller; the larger the angle of the flow guide ring, the deeper the flow guide ring, the higher the working frequency, the greater the net impulse per unit time of the device; In addition, as the angle of the flow guide ring increases Large, detonating point temperature and pressure first increased and then decreased, the maximum angle of about 25 °, and the initiation time advance, the working frequency increases, the unit of time the net impulse of the device also increases.