航空学报2025，Vol.46Issue(18)：35-49,15.DOI:10.7527/S1000-6893.2025.31786
镁粉二次燃烧增强碳氢燃料冲压发动机推力
Secondary combustion of magnesium powder to enhance kerosene-fueled scramjet thrust
摘要
Abstract
To verify the feasibility of enhancing thrust performance in hydrocarbon-fueled scramjet engines through secondary combustion by injecting magnesium powder for fully combusted exhaust gases,a magnesium powder-enhanced direct-connect scramjet experimental system was developed.Experiments were conducted under simulated flight conditions of Mach number 6.0 at an altitude of 30 km.An improved thrust measurement method was employed to obtain the thrust and combustion performance parameters of the powder-based scramjet combustor.The study fo-cused on evaluating the feasibility of the powder enhanced scramjet,the effects of the powder-gas ratio,and the pow-der residence distance on thrust performance.Results demonstrated the viability of the proposed scheme,with mag-nesium powder primarily reacting with water vapor and carbon dioxide in the exhaust gases,where water vapor was the dominant reactant.When 13%magnesium powder was injected,the engine achieved a specific thrust gain of 86.6%and a combustion efficiency of 65.1%.Considering both engine size and performance,the recommended ratio of powder residence distance-to-combustor chamber length is approximately 0.62.关键词
金属燃料/碳氢燃料/粉末超燃冲压发动机/镁粉/推力性能Key words
metal fuel/hydrocarbon fuel/powder scramjet/magnesium powder/thrust performance分类
航空航天引用本文复制引用
王旭,刘佳迅,刘永祺,窦苏沂,李庆宇,徐旭,杨庆春..镁粉二次燃烧增强碳氢燃料冲压发动机推力[J].航空学报,2025,46(18):35-49,15.基金项目
省部级项目 （）
北京航空航天大学博士卓越学术基金 （）
沈元博士卓越学术基金 Provincial or Ministerial Level Project （）
Academic Excellence Foundation of Beihang University for PhD students （）
Outstanding Research Project of Shenyuan Honers College （）
