超临界状态航空煤油裂解的传热特性仿真  

Simulation of Heat Transfer Characteristics of Aviation Kerosene Cracking in Supercritical Pressure

作　　者：粟银 王壮壮 周章文[3] 张登成[3] SU Yin;WANG Zhuang-zhuang;ZHOU Zhang-wen;ZHANG Deng-cheng(Department of Basic Sciences,Air Force Engineering University,Xi'an Shanxi 710051,China;Aviation Maintenance NCO Academy,Air Force Engineering University,Xinyang Henan 464000,China;Aeronautics Engineering College,Air Force Engineering University,Xi'an Shanxi 710038,China)

机构地区：[1]空军工程大学基础部,陕西西安710051 [2]空军工程大学航空机务士官学校,河南信阳464000 [3]空军工程大学航空工程学院,陕西西安710038

出　　处：《计算机仿真》2021年第7期31-35,188,共6页Computer Simulation

基　　金：基础加强计划技术领域基础项目(2019-JCJQ-JJ-085);空军工程大学基础部基金(KJ2019114)。

摘　　要：为研究超临界压力下航空煤油裂解时传热特性,构建了一步裂解总体反应模型,并对5 MPa压力下RP-3航空煤油在水平圆管内存在裂解时的传热特性进行数值模拟,研究了裂解反应和质量流量对航空煤油流动传热的影响。结果表明,裂解反应的发生很大程度上提升了煤油的换热能力,出口处煤油的平均油温和壁面温度分别降低了8.33%和7.92%;RP-3航空煤油发生裂解反应后流体热物性变化明显,导致流速显著增大,流动压力损失增加;入口质量流量降低使煤油发生裂解位置提前且裂解率升高,裂解反应吸收的热量更多,但同时也显著增加了流动压力损失。In order to study the heat transfer characteristics of aviation kerosene under supercritical pressure, a one-step thermal cracking overall reaction model was established to simulate the thermal cracking process of RP-3 aviation kerosene in a horizontal circular tube under 5 MPa pressure, and the influence of thermal cracking reaction and inlet flow mass rate on aviation kerosene flow and heat transfer was studied. The results show that the thermal cracking reaction greatly has improved the heat transfer capacity of kerosene, and the average kerosene temperature and wall temperature at the outlet decrease by 8.33% and 7.92%, respectively. After the thermal cracking reaction of RP-3 aviation kerosene, the thermophysical property of the fluid changes significantly, resulting in a significant increase in the flow velocity and flow pressure loss. With the decrease of inlet mass flow rate, the cracking position of kerosene is advanced and the cracking rate is increased. The cracking reaction absorbs more heat, but the flow pressure loss is also increased significantly.

关 键 词：超临界压力 航空煤油 热裂解 流动换热 

分 类 号：V231.1[航空宇航科学与技术—航空宇航推进理论与工程]