关键词: 金属燃料;水冲压发动机;构型;试验

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