金属燃料/水冲压发动机一次进水试验

Experimental investigation on once injecting water in metal fuel/water ramjet

介绍了金属燃料/水冲压发动机试验系统,采用非壅塞式构型实现了镁基金属燃料发动机一次加水后稳定燃烧,试验中进水流量稳定,补燃室与燃烧室压强变化相同.试验研究了一次水燃比和燃料燃速对发动机燃烧性能的影响,试验结果表明:当一次水燃比在一定范围内变化时,发动机燃烧效率和喷射效率随水燃比增加而先增加后减少;增加燃料燃速可提高发动机燃烧效率和改善发动机工作性能,但燃速增加需满足发动机长时间工作需求.

The experimental system of metal fuel/water ramjet was introduced. The unchoked ramjet of metal fuel containing magnesium can burn steadily after once injecting wa ter. In the experiment, the mass flux of water was stable and the pressure of chamber changed similarly with the secondary chamber. The effect of once water＇ fuel ratio and fuel burn rate for the ramjet was studied through experiments. The results show the combustion and injection efficiency for ramjet firstly increase,and then decrease with the increase of water/fuel ratio in a define range of ratio; also, the combustion efficiency and the operation performance are improved observably by increasing the burn rate of fuel metal whose variation must under the need of the long time operation for the ramjet.