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研究基于国产航空煤油RP-3液相组分数据,提出了单组分、简化3组分和详细13组分3种替代燃料模型,并对采用3组分替代模型计算得到的燃料密度、黏度、导热率、比热容4个热物性参数进行了在不同温度(300~1 000K)和压力(1~15MPa)状态下的分析.结果表明,燃料的物性在超临界压力下,随着温度升高,密度减小,黏性降低,热导率则先降后增,而比热容逐渐增大,同时,在拟临界温度附近,燃料热物性均发生变化剧烈,比热容在不同压力下对应不同峰值点,在3MPa下最大;压力的变化会使得拟临界温度发生改变,给密度的变化程度、比热容的峰值分布和热导率的大小带来一定的影响.采用3组分替代模型预测燃料热沉,经实验验证,其物理热沉吻合较好.
Based on the data of liquid phase components of domestic aviation kerosene RP-3, three alternative fuel models, one component, three components and three components, were proposed. The fuel density, viscosity , Thermal conductivity, specific heat capacity of four thermal properties at different temperatures (300 ~ 1 000K) and pressure (1 ~ 15MPa) state analysis results show that the fuel properties at supercritical pressure, with the increase of temperature , The density decreases, the viscosity decreases, the thermal conductivity decreases first and then increases, and the specific heat capacity increases gradually. Meanwhile, near the pseudo-critical temperature, the thermal properties of the fuel change drastically, and the specific heat capacity corresponds to different peak points under different pressures. The maximum at 3MPa, the change of pressure will make the quasi-critical temperature change, which will affect the degree of density, the peak value of the specific heat capacity and the thermal conductivity.Using the 3-component alternative model to predict the fuel heat sink, Experimental verification, the physical heat sink is better.