Green Ramjets Based on Metal/Water Reaction
Along with much emphasis focusing on the enhancement of operating speed, jet propulsions making full use of atmospheric substances have revealed the profound potential in comparison with turbofans as well as traditional rockets with all propellants brought on board. In this study, Inspiration has been drawn from vast available water as one species of reactants not occupying any space against underwater vehicles, a new conceptual ramjet with a multiple water-injection mechanism was to be put forward based on hydroreactive property of several metals. And from a theoretical point, magnesium-based fuel possessing high energy density was chosen as an attractive option for actualizing performance predictions as well as the green reaction with water. Note that, water plays a vital role in controlling the combustion process and efficacy exertion for a propulsion system, thus the quantity of injected water should be predicted roundly. Firstly, taking a hydroreactive metal fuel with 60％ magnesium by mass as an example, the upper limit of primary water has been estimated approximately as 2.4 owing to ignition condition of magnesium/water reaction. And along with water/fuel ratio, specific impulse reached maximal value of order 5515.90N·s·kg-1 approximately while water/fuel ratio was just 4.6. In addition, higher chamber pressure and higher magnesium mass fraction in hydroreactive metal fuel were both beneficial to ramjet integral performance.
Ramjet Metal/water reaction Magnesium Specific impulse
Yang Yajing He Maogang
Xian Jiaotong University, Xian, Shaanxi, 710049, China
国际会议
2010 International Conference on Digital Manufacturing and Automation(2010 数字制造与自动化国际会议 ICDMA 2010)
长沙
英文
779-784
2010-12-18（万方平台首次上网日期，不代表论文的发表时间）