脉冲爆震发动机供油自适应控制优化设计

Mechanism of fuel self-fit control in pulse detonation engine

关键词:  脉冲爆震发动机+  自适应控制  气动阀  供油滞后+

Key words:  Pulse detonation engine~+  Adaptive control  Pneumatic valve  Fuel supply delay~+

摘要:

研究了带气动阀PDE的供油自适应控制优化设计, 通过在油管中设置单向阀和通过油管自身 (无单向阀), 成功实现PDE的供油自适应控制, 在爆震管直径为 180mm, 长度为 2m, 管内流速为 25m/s的PDE中, 可以产生稳定的爆震波, 并获得 2MPa以上的压力和 1500N以上的峰值推力。通过对不同油管长度、不同工作频率的压力、推力曲线对比研究, 分析了供油自适应控制的机理, 及供油相对进气滞后时间的长短对PDE工作的影响。

Abstract:

The principle of optimized fuel self-fit control in pulse detonation engine with aerovalve was investigated. By setting a one-way valve(or without the one-way valve) in the fuel pipe ,and adjusting the distance between one-way valve and atomizer (or between supply throttle and atomizer),optimized fuel self-fit control of the PDE was achieved .Successive detonation was obtained with peak value exceeding 2.0MPa and 1500N for pressure and net thrust curve respectively in a 180mm diameter and 2m long PDE in which the flow velocity is 25m/s.Based on analysis of variational curves of pressure and thrust with different fuel pipe length and PDE working frequency,the mechanism of fuel self-fit control was studied,and the vital influence of the fuel supply delayed time relative to air entrance to PDE working is discussed.