航空煤油RP-3结焦产物的物性

在环境温度为800K和900K条件下,获取RP-3航空煤油结焦产物,通过试验获得表观形貌及物性,拟合了结焦产物的比热容和导热系数随温度变化的经验关系式。结果表明:航空煤油结焦产物的微观结构为球状颗粒堆积且表面存在可见孔隙,表观密度约为1 049kg/m~3,真密度约为1 498kg/m~3,孔隙率约为29.9%,环境温度为800K下生成的油焦真密度较900K下生成的小;通过闪光法测得油焦比热容约为1.1~2.2J/(g·K),导热系数约为0.19~0.28W/(m·K),比热容和导热系数均随着温度的升高而增加,环境温度为800K下生成的油焦比热容和导热系数较在900K条件下生成的略大。

Physical properties of coke from the RP-3 kerosene

Some morphology and physical properties of the coke from the RP-3 kerosene at ambient temperature 800K and 900K were experimentally studied. The empirical correlations of specific heat capacity and thermal conductivity were summed up. The results indicate that the coke is an accumulation of microcosmical spherical particles. There were pores and cracks on the surface of coke, which had an envelope density of approximately 1049kg/m3, a real density of approximately 1498kg/m3 and a porosity of approximately 29.9%. The coke had lower real density formed at ambient temperature 800K compared with that at ambient temperature 900K. Specific heat capacity and thermal conductivity of the coke were measured by the flash method. Specific heat capacity was approximately 1.1 to 2.2J/(g·K) and thermal conductivity was approximately 0.19 to 0.28W/(m·K), both of which increased with increasing temperature. The coke had higher specific heat capacity and thermal conductivity formed at ambient temperature 800K compared with that at 900K.