摘要
针对一种应用于高超声速飞行器再生冷却的高密度碳氢燃料,提出适用于其超临界态流动及换热特性研究的替代燃料模型。基于实验获得的碳氢燃料高温裂解的产物组分及现有航空煤油替代模型,提出三组分替代模型,以多物性参数分子摩尔质量、密度、运动黏度、比热容和导热系数为遴选指标,通过多目标优化寻出一种替代燃料模型(71.1%反式十氢化萘、19.4%正十二烷、9.5%正十三烷)。基于碳氢化合物的混合热物性参数数据库(NIST SUPERTRAPP),通过二次开发对替代燃料模型的超临界态热物性进行预测和分析,发现在临界压力2.8MPa,临界温度700K附近,该种碳氢燃料的热物性参数变化最明显,并且随着压力的升高,变化逐渐变小。
The high-density endothermic hydrocarbon fuel was developed for the application of regenera-tive cooling in hypersonic vehicles,and a surrogate model of this fuel was proposed for studying fuel flow and heat transfer in supercritical state.A three-component model was chosen based on the product components cap-tured in high-temperature pyrolysis experiments of this endothermic hydrocarbon fuel,as well as the surrogate models for current aviation kerosene.The molecular mass,density,kinematic viscosity,specific heat capacity and thermal conductivity were selected as the objectives,and the optimal surrogate model consisting of 71.1%trans-decalin,19.4%n-dodecane and 9.5%n-tridecane was found by the multi-objective optimization method.The secondary development on the NIST SUPERTRAPP was applied to predict and analyze the thermophysical properties of the surrogate model in supercritical state,which showed that the most obvious change of thermophys-ical property was located around the critical pressure of 2.8MPa and the critical temperature of 700K.Besides,the change of that in the supercritical state decreased gradually with the increase of pressure.
作者
郑寅泰
孙文静
王兴黎
张靖周
凌文辉
ZHENG Yin-tai;SUN Wen-jing;WANG Xing-li;ZHANG Jing-zhou;LING Wen-hui(College of Energy and Power Engineering,Nanjing University of Aeronautics and Astronautics,Nanjing 210016,China;Beijing Power Machinery Institute,Beijing 100074,China)
出处
《推进技术》
EI
CAS
CSCD
北大核心
2023年第11期245-254,共10页
Journal of Propulsion Technology
基金
中国博士后基金站前特别资助(2020TQ0143)
江苏省自然科学基金青年基金(BK20200448)。
关键词
高密度碳氢燃料
替代燃料模型
热物性参数
超临界态
多目标寻优
High-density hydrocarbon fuel
Surrogate fuel model
Thermophysical property
Supercriti-cal state
Multi-objective optimization