倾斜圆管内超临界RP-3流动换热特性数值研究  

Numerical Study on Flow and Heat Transfer Characteristics of Supercritical RP-3 in Inclined Tubes

作　　者：王龙云 朱剑琴[1] 李海旺[1] 程泽源 WANG Long-yun;ZHU Jian-qin;LI Hai-wang;CHENG Ze-yuan(National Key Laboratory of Science and Technology on Aero-Engine Aero-thermodynamics,School of Energy and Power Engineering,Beihang University,Beijing 100191,China)

机构地区：[1]北京航空航天大学能源与动力工程学院航空发动机气动热力国家级重点实验室,北京100191

出　　处：《推进技术》2018年第7期1562-1567,共6页Journal of Propulsion Technology

基　　金：国家自然科学基金(51406005);国防基础科研计划资助(B2120132006)

摘　　要：采用数值模拟方法对倾斜圆管内超临界RP-3的流动换热特性进行研究,以获得倾斜角度对流动换热的影响规律及作用机理。物性参数由RP-3的四组分替代模型获得,湍流模型选择LS低雷诺数k-ε模型,通过计算结果与实验数据的对比保证计算方法的准确性。分析倾角为45°的圆管内壁温轴向及周向分布变化规律,发现浮升力引起的截面内二次流与热加速效应分别导致两次壁温峰值的出现,而质量流量由0.3g/s增加至0.9g/s过程中,浮升力作用效果减弱,湍流强度增大,两次峰值先后消失;在垂直流向与沿流向浮升力综合作用下,-90°~90°不同倾角管内表现出不同换热规律。In order to obtain the effects of inclination on flow and heat transfer characteristics of supercritical RP-3,numerical study in inclined tubes with a four-species surrogate model of RP-3 and LS low Reynolds number k-ε turbulence model was carried out. The results were compared with experimental data to guarantee the accuracy of numerical method. Wall temperature distributions of 45° inclined tube in longitudinal direction and circumferential direction were analyzed and two peaks were attributed to the secondary flow caused by buoyancy force and the thermal acceleration. When increasing the mass flux from 0.3 g/s to 0.9 g/s,the effect of buoyancy force weakened and the turbulence enhanced which resulted in the disappearance of two peaks. Different heat transfer regularities appeared at different angles from-90° to 90° on account of the distribution of buoyancy forces that＇s perpendicular to the flow direction and along the flow direction.

关 键 词：超临界 RP-3 倾斜圆管 二次流 换热 

分 类 号：V312.1[航空宇航科学与技术—航空宇航推进理论与工程]