| 摘要: |
| 基于常温常压轴向进气条件下气动阀式两相爆震发动机模型开展爆燃到爆震转捩过程的研究,利用离子探针和高频压力传感器测量了管内火焰传播速度和燃烧压力波。研究结果表明,管内爆震波形成的初始位置在正常火焰面下游的一定位置处,如假设爆震管内波和火焰面是一维的,则在爆震波产生的最初一段时间内,爆震管内将出现三道火焰面:往出口方向传播的正常火焰面和爆震波火焰面及往进口方向传播的回传爆震波火焰面。 |
| 关键词: 脉动式喷气发动机 爆震 爆燃到爆震转捩过程+ 火焰 传播速度 |
| DOI： |
| 分类号:V235 |
| 基金项目:国防基础预先研究(k1600060704)。 |
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| Experimental investigation of deflagration to detonation transition in two-phase mixture combustion |
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HE Xiao-min, ZHANG Peng-gang, WANG Jia-hua
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Coll. of Energy and Power, Nanjing Univ. of Aeronautics and Astronautics, Nanjing 210016,China
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| Abstract: |
| A multi-cycle pulse detonation engine, filling liquid gasoline/air mixture initially at 300K and 0.1MPa, was designed to study the two-phase deflagration to detonation transition mechanism. In experiments,ionization probes and pressure transducers were utilized to get the velocity and pressure of the combustion wave in the tube, respectively. The results show that detonation wave caused mainly by the shock wave forms ahead of the deflagration flame, and at the beginning of the producing detonation there exist three flames in the tube: deflagration, detonation and retonation if the combustion wave is supposed one dimensional. |
| Key words: Pulsejet engine Pulse detonation Deflagration to detonation transition~+ Flame Propagation velocity |
