类椭圆形CMC火焰筒多斜孔冷却性能数值分析  

Numerical analysis on cooling performance of quasi-elliptic multi-inclined holes in CMC combustion liner

作　　者：于国强 隋正卿 陈正扬 倪政 杜金康 高希光 宋迎东 YU Guoqiang;SUI Zhengqing;CHEN Zhengyang;NI Zheng;DU Jinkang;GAO Xiguang;SONG Yingdong(Jiangsu Province Key Laboratory of Aerospace Power System,College of Energy and Power Engineering,Nanjing University of Aeronautics and Astronautics,Nanjing 210016,China;State Key Laboratory of Mechanics and Control of Mechanical Structures,Nanjing University of Aeronautics and Astronautics,Nanjing 210016,China)

机构地区：[1]南京航空航天大学能源与动力学院江苏省航空动力系统重点实验室,南京210016 [2]南京航空航天大学机械结构力学及控制国家重点实验室,南京210016

出　　处：《航空动力学报》2025年第1期35-42,共8页Journal of Aerospace Power

基　　金：国家科技重大专项(2017-Ⅳ-0005-0042);国家自然科学基金(12202186);江苏省自然科学基金(BK20210272)。

摘　　要：为了提高陶瓷基复合材料火焰筒壁面的冷却性能,在现有的圆形多斜孔冷却结构的基础上,设计了一种新型类椭圆形多斜孔冷却结构。同时,采用三维数值模拟的方法将两种多斜孔结构的冷却效果进行了对比。结果表明:新型类椭圆斜孔特征模拟件相较于圆孔特征模拟件,壁面高温区域明显变窄,高温热斑减少,温度分布更加均匀;在经纱方向,类椭圆斜孔特征模拟件高应力区域减少,应力集中现象减弱;在纬纱方向,类椭圆斜孔特征模拟件与圆孔特征模拟件均存在高应力区域。In order to improve the cooling performance of ceramic matrix composite combustion liner wall,a new quasi-elliptic multi-inclined hole cooling structure was designed on the basis of the existing circular multi-inclined hole cooling structure.Meanwhile,the cooling effects of two kinds of multiinclined hole structures were compared by using three-dimensional numerical simulation method.The results showed that:compared with the circular hole feature simulator,the high temperature area on the wall of the new quasi-elliptic inclined hole simulated part was obviously narrower,the hot spots at high temperature were reduced,and the temperature distribution was more uniform.In the warp yarn direction,the high stress area of the simulated part with quasi-elliptic inclined hole features was reduced,and the stress concentration phenomenon was weakened.In the weft yarn direction,the high stress regions in the feature simulators of quasi-elliptic inclined hole and circular hole were found.

关 键 词：冷却结构 类椭圆斜孔 陶瓷基复合材料 火焰筒 孔阵排列 

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]