超临界态航天煤油管内对流换热特性研究  

Convective Heat Transfer Characteristics of Aviation Kerosene under Supercritical State in Tube

作　　者：刘少斌 杜宗罡[3] 韩伟[3] 张晓罗 任亚涛[1,2] 齐宏[1,2] LIU Shao-bin;DU Zong-gang;HAN Wei;ZHANG Xiao-luo;REN Ya-tao;QI Hong(School of Energy Science and Engineering, Harbin Institute of Technology, Harbin 150001, China;Key Laboratry of Aerospace Thermal Physics Industry and Information Technology, Harbin Institute of Technology, Harbin 150001, China;Xi'an Aerospace Power Test Technology Institute, Xi'an 710100, China)

机构地区：[1]哈尔滨工业大学能源科学与工程学院,黑龙江哈尔滨150001 [2]哈尔滨工业大学空天热物理工业和信息化部重点实验室,黑龙江哈尔滨150001 [3]西安航天动力试验技术研究所,陕西西安710100

出　　处：《节能技术》2020年第4期291-298,共8页Energy Conservation Technology

基　　金：装备预研航天科技联合基金。

摘　　要：燃料再生冷却是最好的航天发动机热防护方法之一,但航天发动机工作时煤油会处于超临界态,其对流换热特性会显著改变,甚至出现传热恶化。为了探究航天煤油在超临界态下对流换热特性,本研究使用Ansys Fluent软件以超临界状态下小管径圆管内RP-3煤油为研究对象,围绕圆管管径、壁面热流密度、煤油质量流率、出口压力等因素对煤油在小管径圆管内对流换热特性的影响进行分析,通过结果对影响机理进行阐述。此外,本研究还设置分组对照的边界条件,对临界态煤油管内流动发生的传热恶化现象进行模拟,并分析了传热恶化的产生机理,发现传热恶化的发生与煤油热物性在拟临界温度附近剧烈的变化有关。Fuel regenerative cooling is one of the best thermal protection methods for aerospace engines,but kerosene will be in a supercritical state when aerospace engines work,and its convective heat transfer characteristics change significantly and even comes to heat transfer deteriorates.In this study,RP-3 kerosene in small diameter tube under supercritical state are numerically simulated by Ansys Fluent.The effects of various factors such as tube diameter,wall heat flow density,mass flow rate of kerosene and outlet pressure on the convection and heat transfer characteristics of kerosene in a small tube are analyzed,and the mechanism of influence is given.In addition,with given boundary conditions,the heat transfer deterioration in supercritical kerosene flow is simulated.The result shows that the occurrence of heat transfer deterioration is related to the dramatic changes in the thermal properties of kerosene near the quasi-critical temperature.

关 键 词：航天煤油 超临界状态 传热特性 传热恶化 

分 类 号：V233.5[航空宇航科学与技术—航空宇航推进理论与工程] TB131[理学—物理]