【摘要】 考察了作为高超音速飞行器冷却剂的吸热型烃类燃料挂式四氢双环戊二烯exo THDCPD、甲基环己烷MCH以及对比样航煤RP 3的热稳定性能。结果表明 ,三种燃料的热氧化沉积在某温度下存在波峰 ,热裂解沉积随温度升高迅速增加 ,基本呈指数关系。RP 3的热稳定性能最差 ,THDCPD与MCH较为接近 ,在高温时优于MCH。随进料流量的增加 ,热裂解沉积不断增加 ,热氧化沉积先增加 ,在高流量时趋于定值。PhilipsXL30ESEM环境扫描电子显微镜分析表明 ,三者的热氧化沉积及热裂解沉积有着不同的形态。热裂解沉积均发现了含有金属微粒长条状的细丝碳 ,这一现象在MCH热裂解沉积中最为显著。更多还原

【Abstract】 As candidate endothermic fuels, synthesized hydrocarbon fuel exo-tetrahyrdo dicyclopentadiene THDCPD, methyl cyclohexane MCH and aviation kerosene RP-3 are investigated on their thermal stability. It is found that there is a peak in thermal oxidation deposit at 220℃, 240℃ ,220℃ for RP-3, MCH and THDCPD respectively. Pyrolytic deposits of three fuels increase dramatically and are approximately exponential function with the reaction temperature. Thermal stability of RP-3 is worst among three fuels, thermal stability of THDCPD is close to that of MCH, and THDCPD even display better thermal stability than that of MCH in high temperature. With increasing flow rate, the oxidation deposit increases at low flow rate, and arrives at a given value at high flux rate. Analyzed by Philips XL30 ESEM, both the oxidation deposits and pyrolytic deposits of three fuels show different figure. And filamentous carbon, which contains metal particles that have been removed from the heat transfer surface, has been found in the pyrolytic deposits of three fuels. This phenomenon is most obvious in the pyrolytic deposit of MCH.更多还原