The propagation modes of rotating detonation waves supplied with liquid kerosene and oxygen-enriched air were experimentally investigated. Experiments were conducted while maintaining the equivalence ratio at approximately 0.7 and varying the mass flow rate of the oxidizer from 585.3 to 1493.8 g/s. Three propagation modes were obtained, and the propagation characteristics of rotating detonation waves in each mode were extensively analyzed. The results reveal that for the test model with an equivalence ratio of 0.7, the rotating detonation waves exhibit three types of modes in sequence as the mass flow rate of the oxidizer increases, namely, single-wave mode, single/dual-wave hybrid mode, and dual-wave mode. The propagation modes of rotating detonation waves vary randomly in the single/dual-wave hybrid mode, and the mode transition processes are more likely to be accompanied by transient detonation wave extinction due to the lower activity of liquid kerosene. For the single/dual-wave hybrid mode, the pressure feedback of rotating detonation waves to oxidizer plenum in the single-wave mode is greater than that in the dual-wave mode, which is related to the higher pressure peaks of rotating detonation waves in the single-wave mode. Moreover, the relative standard deviation of the propagation frequency is calculated to evaluate the propagation stability of the rotating detonation wave. It was found that the rotating detonation waves possess higher propagation stability in the dual-wave mode than in the single-wave mode.

实验研究了由液态煤油和富氧空气供给的旋转爆震波的传播模式。在将当量比保持在大约 0.7 并将氧化剂的质量流量从 585.3 更改为 1493.8 g/s 的同时进行实验。获得了三种传播模式，并对每种模式下旋转爆震波的传播特性进行了广泛的分析。结果表明，对于当量比为0.7的试验模型，随着氧化剂质量流量的增加，旋转爆震波依次呈现三种模式，即单波模式、单/双波混合模式，和双波模式。旋转爆震波的传播模式在单/双波混合模式中随机变化，由于液态煤油的活性较低，模态转换过程更可能伴随瞬态爆轰波消光。对于单/双波混合模式，单波模式下旋转爆震波对氧化剂增压室的压力反馈大于双波模式，这与旋转爆震波的压力峰值较高有关。单波模式。此外，通过计算传播频率的相对标准偏差来评价旋转爆震波的传播稳定性。结果表明，旋转爆震波在双波模式下比在单波模式下具有更高的传播稳定性。对于单/双波混合模式，单波模式下旋转爆震波对氧化剂增压室的压力反馈大于双波模式，这与旋转爆震波的压力峰值较高有关。单波模式。此外，通过计算传播频率的相对标准偏差来评价旋转爆震波的传播稳定性。结果表明，旋转爆震波在双波模式下比在单波模式下具有更高的传播稳定性。对于单/双波混合模式，单波模式下旋转爆震波对氧化剂增压室的压力反馈大于双波模式，这与旋转爆震波的压力峰值较高有关。单波模式。此外，通过计算传播频率的相对标准偏差来评价旋转爆震波的传播稳定性。结果表明，旋转爆震波在双波模式下比在单波模式下具有更高的传播稳定性。计算传播频率的相对标准偏差，评价旋转爆震波的传播稳定性。结果表明，旋转爆震波在双波模式下比在单波模式下具有更高的传播稳定性。计算传播频率的相对标准偏差，评价旋转爆震波的传播稳定性。结果表明，旋转爆震波在双波模式下比在单波模式下具有更高的传播稳定性。