再生冷却弧肋通道跨临界流动与传热特性数值研究  

Numerical Study on Cross Critical Flow and Heat Transfer Characteristics of Regenerating Cooling Arc Rib Channel

作　　者：朱洁[1] 韩怀志 杨陈罡 罗文[1] 李象远[1] ZHU Jie;HAN Huaizhi;YANG Chenggang;LUO Wen;LI Xiangyuan(Engineering Research Center of Ministry of education,Sichuan University,Chengdu,Sichuan Province,610065 China)

机构地区：[1]四川大学空天动力燃烧与冷却教育部工程研究中心,四川成都610065

出　　处：《科技创新导报》2020年第19期51-54,共4页Science and Technology Innovation Herald

基　　金：四川大学引进人才科研启动金《超临界吸热型碳氢燃料再生冷却过程流-热-裂解强耦合机理研究》(项目编号:20822041C4013)。

摘　　要：本文采用SST k-ω湍流模型针对再生冷却微肋结构通道中正癸烷跨临界流动与换热性能进行了数值模拟研究,对比分析了光滑冷却通道、直肋和弧肋冷却通道的平均努塞尔特数、摩擦系数和综合换热因子。结果表明,光滑通道在跨临界温度区会产生传热恶化现象,而直肋和弧肋通道都可以有效抑制传热恶化,且弧肋通道的强化换热效果整体优于直肋通道。The SST K-ωturbulence model is used to simulate the cross critical flow and heat transfer performance of n-decane in the regenerating cooling micro rib channel.The average Nusselt number,friction coefficient and comprehensive heat transfer factor of smooth cooling channel,straight rib and arc rib cooling channel are compared and analyzed.The results show that the heat transfer deterioration will occur in the smooth channel in the transcritical temperature region,and the straight rib channel and the arc rib channel can effectively inhibit the heat transfer deterioration,and the heat transfer enhancement effect of the arc rib channel is better than that of the straight rib channel as a whole.

关 键 词：弧肋通道 再生冷却 跨临界流动 强化传热 正癸烷 

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]