文献类型：期刊文献

英文题名：Overall Heat Transfer Coefficient Evaluation Method for Uncracked Hydrocarbon Fuel in a Regeneratively-Cooled Heat Exchanger of a Scramjet

作者：Li, Haowei[1];Lin, Guowei[1];Xu, Qing[1];Fang, Xiaojia[1];Xian, Shengxian[1]

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

年份：2022

卷号：12

期号：13

外文期刊名：APPLIED SCIENCES-BASEL

收录：SCI-EXPANDED(收录号：WOS:000823681500001)、、Scopus(收录号：2-s2.0-85133630700)、WOS

基金：This study was funded by the Fund of Characteristic innovation projects of ordinary colleges and universities in Guangdong Province (2019KTSCX058), the Program for Scientific Research Start-up Funds of Guangdong Ocean University (R20073), the Zhanjiang Marine Youth Talent Innovation Project (210830144542867), and the Postgraduate Education Innovation Project of Guangdong Ocean University (202257).

语种：英文

外文关键词：overall heat transfer coefficient modification; convective heat transfer; hydrocarbon fuel; scramjet

外文摘要：Regenerative cooling is critical for the thermal protection of hypersonic propulsion systems, wherein the flow and heat transfer characteristics of the hydrocarbon fuel in the cooling channel are crucial. Restricted by measurement, the distribution of the fuel temperature inside the cooling channel cannot be directly detected. As a result, the measurement of the convective heat transfer coefficient is more an overall heat transfer coefficient. Furthermore, the existing overall heat transfer coefficient calculation method is derived without considering the flow state of the hydrocarbon fuel in the cooling channel, which should be taken into consideration. Therefore, a modified calculation method of the overall heat transfer coefficient is proposed in this study. The results of the characteristics of the turbulence-related parameters show that the overall heat transfer coefficient is mainly determined by the effective thermal conductivity and surface convective heat transfer coefficient, which are related to the fuel temperature and flow state. Furthermore, the existing method might overestimate the overall heat transfer coefficient. The modified method is suitable for the calculation of the overall heat transfer coefficient in the heat transfer enhancement process in a cooling channel.