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采用可视化燃烧实验器模拟发动机的水蒸汽环境,用高速摄影拍摄燃料在水蒸汽中的燃烧过程,并用热电偶测温,研究了燃料配方参数对镁基水反应金属燃料/水蒸汽反应的影响规律。研究结果表明,镁基水反应金属燃料与水反应分快速反应和慢速反应两阶段,反应速率随时间和反应程度的增加而降低;镁基水反应金属燃料/水反应的快速反应时间和反应程度是表征燃料/水反应特性的两个关键参数;增加燃料的氧粘比和细镁粉含量、添加Fe类添加剂都可以提高燃料/水反应速率和反应程度,而增大镁含量会使燃料/水反应速率及反应程度降低。保证镁含量60%以上燃料的能量性能、工艺性能和力学性能的前提下,应尽量提高燃料氧粘比和细镁粉含量。
The visualized combustion experiment simulates the water vapor environment of the engine, photographs the combustion process of the fuel in the water vapor by high-speed photography, and uses the thermocouple to measure the temperature to study the effect of the fuel formula on the reaction of the metal-based water / metal vapor reaction . The results show that the reaction rate of magnesium-based water-reactive metal-fuel with water is divided into two parts: rapid reaction and slow reaction, and the reaction rate decreases with the increase of reaction time and reaction time. The reaction time and reaction time of reaction of magnesium-based water with metal- The degree is the two key parameters to characterize the fuel / water reaction characteristics. Increasing the oxygen-to-oxygen ratio and the fine magnesium content of the fuel and the addition of the Fe-type additive can both increase the fuel / water reaction rate and the degree of reaction. Increasing the magnesium content will cause the fuel / Water reaction rate and the degree of reaction is reduced. Under the precondition of ensuring the energy performance, technological performance and mechanical properties of the fuel with the magnesium content above 60%, the oxygen and viscous ratio of fuel and the content of fine magnesium powder should be increased as much as possible.