论文部分内容阅读
为探索微型脉冲爆震发动机推进系统的可行性,进行了微空间内爆震极限特性的研究.通过对预混氢气/氧气爆震火焰在平板狭缝中的传播过程进行测量,分析了爆震波压力、速度随当量比和间隙尺寸的变化趋势,发现在极限范围外,来自稳流段的爆震波都能在间隙内通过压力和速度的自我调整后达到稳定状态,调整过程所需的距离随间隙尺寸减小而增长.根据爆震波速度衰减的定义,给出了激波和火焰锋面速度沿间隙通道方向的变化特点,观察到了微尺寸下爆震波的4种传播模式:稳定爆震波、准稳定爆震波、低速爆震波和非爆震波.
In order to explore the feasibility of micro-pulse detonation engine propulsion system, the study of the detonation limit characteristic in micro-space was carried out.Based on the measurement of the propagation process of premixed hydrogen / oxygen detonation flame in the flat slot, the influence of detonation wave Pressure and velocity change with equivalence ratio and gap size. It is found that beyond the limit range, the detonation wave from the steady flow section can reach a steady state through self-adjustment of pressure and velocity in the gap, and the distance required for the adjustment process varies with According to the definition of detonation velocity attenuation, the characteristics of the shock wave and the front of the flame along the direction of the clearance channel are given. Four propagation modes of detonation wave are observed under the micro-size condition: stable detonation wave Stable detonation waves, low-velocity detonation waves and non-detonation waves.