燃烧室构型对旋转爆震波传播特性的影响

To analyze the propagation characteristics of the rotating detonation waves in different combustors, five combustors with different structural parameters were adopted, including one hollow chamber, two kinds of annular chambers, and two kinds of cavity chambers. Experiments were conducted in different combustors under the same supplying condition utilizing ethylene and oxygen-enriched air. The fuel and oxidizer were injected separately through a slot-orifice injection structure. The characteristics of the rotating detonation wave and propulsive performance are discussed. In the hollow chamber, the rotating detonation wave propagates steadily in the stable detonation mode with a wider range of equivalence ratio, while the propulsive performance is the lowest. In the cavity chambers, the operating range of the stable detonation mode is between the two annular chambers with chamber widths of 19 mm and 15 mm, but the propulsive performance is slightly higher than that of the annular chamber with a width of 19 mm. In addition, the operating range based on the cavity chambers increases with the increase of the cavity length.