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通过改变空气、氢气质量流量,在大工况范围内开展了H2/Air连续旋转爆震试验,结合高频压力测量和高速摄影观测手段,重点分析了同向传播模式下的爆震波传播过程。在该模式下爆震波头个数随推进剂总流量的增大而增多,但同一时刻所有爆震波头的传播方向相同。试验发现了单波、混合单/双波、双波三种连续旋转爆震波传播模态,三种模态分别对应一定的试验工况范围。单波模态下的爆震波传播主频为5.05~5.8kHz,平均传播速度为1510~1735m/s;双波模态下的爆震波传播主频为8.6~9.9kHz,平均传播速度为1280~1480m/s;而在混合单/双波模态下,在试验过程中爆震波头个数会发生变化。当试验工况位于工况范围中间时,单、双波模态下的爆震波传播过程比较稳定,不会改变传播方向;而当试验工况位于工况范围边界时,发现了连续旋转爆震波改变传播方向的现象。
By changing the mass flow rate of air and hydrogen, the H2 / Air continuous rotary detonation test was carried out in a wide range of working conditions. Combined with the measurement of high frequency pressure and high-speed photogrammetry, the propagation of detonation wave in co-directional propagation mode was analyzed emphatically. In this mode, the number of detonation wavers increases with the total flow of propellant, but the propagation directions of all detonation wavers are the same at the same time. The experiment found three kinds of single-wave, mixed single / two-wave and two-wave continuous rotation detonation wave propagation modes, and the three modes correspond to a certain range of test conditions respectively. Under the single-wave mode, the dominant frequency of the detonation wave is 5.05-5.8kHz and the average propagation velocity is 1510-1735m / s. The detonation wave propagation frequency is 8.6-9.9kHz in the dual-wave mode and the average propagation velocity is 1280 ~ 1480m / s; while in the mixed single / dual mode, the number of detonation waveguides will change during the test. When the test condition is in the middle of the working condition, the propagation of the detonation wave in the single and dual modes is stable without changing the propagation direction. When the test condition is at the boundary of the working condition, the continuous rotation detonation wave is found Change the direction of the phenomenon of transmission.