Abstract: Based on the studies of collaborative optimization for the air-breathing liquid-fuel pulse detonation engine (PDE), a kind of blunt aero-valve is designed to guarantee the trapping efficiency, reduce the resistance, improve the detonation performance and augment the thrust. The diameter of the inlet valve and the blunt thrust wall are the same as diameter of the detonation tube. A cylindrical groove is slotted in the thrust wall and an annular channel is set on the outside of the blunt body. There is a reasonable clearance between the blunt body and the inlet of the annular channel. Experiments show that the PDE with blunt aero-valves with different detonation tube diameters can work in coordination; the detonation combustion performance is better than that of swirling aero-valve; when the fuel is supplied on the front of the aero-valve, the detonation combustion performance is better.

Key words: pulse detonation engine (PDE), aero-valve, combustion, detonation wave, inlet channel

摘要： 在吸气式液体燃料脉冲爆震发动机(PDE)协调工作基础上, 为了保证进气效率、减小阻力、提高爆震性能、增加推力, 设计了一种钝体气动阀。该钝体气动阀的进气道和钝体推力壁直径与爆震管直径相同, 推力壁设置圆柱形凹槽, 在钝体外侧设置环形通道, 钝体与环形通道出口保持合理间隙。实验证明: 不同爆震管直径的钝体气动阀PDE能够协调工作, 其爆震燃烧性能优于旋流气动阀, 在气动阀前方供油的爆震燃烧性能优于后方供油。

关键词: 脉冲爆震发动机(PDE), 气动阀, 燃烧, 爆震波, 进气道