文献类型：期刊文献

英文题名：Evaluation Model for Fast Convective Heat Transfer Characteristics of Thermal Cracked Hydrocarbon Fuel Regenerative Cooling Channel in Hydrocarbon-Fueled Scramjet

作者：Xu, Qing[1];Lin, Guowei[1];Li, Haowei[1]

机构：[1]Guangdong Ocean Univ, Sch Mech & Power Engn, Dept Thermal Power & Power Engn, 1 Haida Rd, Zhan Jiang 524088, Peoples R China

年份：2021

卷号：199

外文期刊名：APPLIED THERMAL ENGINEERING

收录：SCI-EXPANDED(收录号：WOS:000709743600004)、、EI(收录号：20214010975035)、Scopus(收录号：2-s2.0-85116022729)、WOS

语种：英文

外文关键词：Convective heat transfer; Endothermic pyrolysis; Hydrocarbon fuel; Scramjet

外文摘要：Regenerative cooling is critical for hypersonic propulsion systems, wherein the flow and heat transfer characteristics of the hydrocarbon fuel in the cooling channel are crucial. The most commonly used existing evaluation models for flow and heat transfer characteristics use one-step overall reaction endothermic pyrolysis; however, they are limited to mildly cracked hydrocarbon fuel working conditions. To quickly evaluate the flow and heat transfer characteristics of hydrocarbon fuel under both mild-and heavy-cracking conditions, a quasi -onedimensional model was established in this study; considering 18 species and 24 reactions, and a simplified mechanism of n-decane. The flow and heat transfer characteristics under different cooling channel lengths and heat fluxes were studied. The results show that the proposed model has fast flow and heat transfer characteristics evaluation capability, and small persistent errors. Furthermore, the calculation results under different inlet fuel mass flow and heat flux working conditions showed that the hydrocarbon fuel flow and heat transfer characteristics vary with the fuel mass flow and heat flux, which can enhance both heat transfer and deterioration. The influence of the heat flux can be used to measure the fuel temperature inside the channel.