中心锥冲击-气膜复合冷却结构流动换热特性  

Flow and heat transfer characteristics of impingement-film composite cooling structures on center cone

作　　者：李录博 王春华[1,2] 王宇楠[1,2] 张靖周 LI Lubo;WANG Chunhua;WANG Yunan;ZHANG Jingzhou(College of Energy and Power Engineering,Nanjing University of Aeronautics and Astronautics,Nanjing,Jiangsu 210016,China;Key Laboratory of Thermal Management and Energy Utilization of Aircraft,Ministry of Industry and Information Technology,Nanjing University of Aeronautics and Astronautics,Nanjing,Jiangsu 210016,China)

机构地区：[1]南京航空航天大学能源与动力学院,江苏南京210016 [2]南京航空航天大学航空飞行器热管理与能量利用工业和信息化部重点实验室,江苏南京210016

出　　处：《江苏大学学报(自然科学版)》2025年第2期163-171,共9页Journal of Jiangsu University:Natural Science Edition

基　　金：国家重点研发计划项目(J2019-Ⅲ-0019-0063)。

摘　　要：针对中心锥冲击-气膜复合冷却结构的流动换热特性展开了数值和试验研究.结果表明:燃气在中心锥表面发生回流,并生成回流涡旋,涡旋尺度随着吹风比的升高而增大;中心锥热侧壁温沿流向呈不断上升趋势,吹风比的增大可提升综合冷却效果,但相对压力损失也有所增大;随着气膜孔直径的增大,冷却效果逐渐提升,相对压力损失逐渐减小;冲击孔直径的增大削弱了综合冷却效果,相对压力损失有所下降;改变冲击距离对流动换热规律影响较小.Numerical and experimental studies were performed on the flow and heat transfer characteristics of impingement-film composite cooling structures on center cone.The results show that the gas recirculation occurs on the surface of center cone,and the recirculation vortex is generated.The vortex scale is increased with the increasing of blowing ratio.The hot wall temperature of center cone is increased along the flow direction,and the increasing of blowing ratio can improve the overall cooling effectiveness and increase the relative pressure drop.Increasing film-hole diameter can improve the overall cooling effectiveness and reduce the relative pressure drop.With the increasing of impinging-hole diameter,the overall cooling effectiveness is decreased slightly,and the relative pressure drop is decreased to some degree.The variation of impinging distance has little influence on the flow and heat transfer law.

关 键 词：中心锥 冲击-气膜复合冷却 综合冷却效果 相对压力损失 流量系数 

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]