Abstract: Aiming at better understanding the effects of configuration on the combustion performance of water ramjet motor, experimental research has been carried out on the combustion performance analysis for the water ramjet motor with middle-quantity metal fuel after the first water injection. Four different motor configurations have been adopted for the experiments through which the performance parameters such as the combustor pressure, combustion efficiency and ejection efficiency was obtained. It was observed that the motor performance is greatly affected by the configuration. The convergence section after the water injection location will result in the pressure vibration phenomena and low ejection efficiency. When the first combustion production of the metal fuel is injected into the complementary combustion to react with water, the pressure vibration will be suppressed while a great amount of residue is produced. The motor achieves stable working state and higher ejection efficiency by connecting the combustor and the secondary combustion chamber directly.

Key words: Metal fuel；Water ramjet；Configuration；Experiment

摘要： 为了获得水冲压发动机构型对其燃烧性能的影响,采用中等金属含量燃料研究了四种发动机构型一次加水后的燃烧性能,试验得到了发动机压强、燃烧效率和喷射效率等性能参数。试验表明,不同发动机构型对发动机工作过程存在较大影响,发动机进水后存在收敛段,会出现压强振荡现象,收敛段也会降低喷射效率。金属燃料自持燃烧产物通过喷孔进入补燃室与水发生反应,虽可消除发动机压强振荡现象,但燃烧室会产生大量残渣。将燃烧室和补燃室直接相连,可实现发动机稳定工作,提高喷射效率。 

关键词: 金属燃料;水冲压发动机;构型;试验