多孔多层板发散冷却特性(一)直通道  

Characteristics of Transpiration Cooling for Porous Multi-Laminated Plates—I. Straight Channels

作　　者：吴海玲[1] 彭晓峰[1] 陶涛[1] 张志学[2] 

机构地区：[1]清华大学,北京100084 [2]沈阳发动机设计研究所,沈阳110015

出　　处：《航空发动机》2004年第1期19-22,共4页Aeroengine

摘　　要：多孔多层板发散冷却技术是解决现代高性能燃气轮机冷却问题的有效途径。针对Lamilloy类型的 3层多孔层板结构 ,以层板单元为对象 ,进行了直通道内多孔多层板流动换热特性的数值模拟研究。结果表明 ,层板单元内流动换热关于对角面对称 ,各层板间隙内流动结构基本相同。流体在层板间隙内经历了小孔高速射流冲击板面及绕过支撑凸台向下一层板小孔汇流的过程。层板内换热非常强烈 ,换热最强的部位在冲击射流滞止区。The numerical simulation of heat transfer for the porous multilaminated plates was conducted in order to investigate the heat trasfer characteristic in straighe channels. The results show the symmetry of the flow and the heat transfer about the diagnal planes and the similarity of the flow structure in laminate gaps, which are characterized by jet impinging, expanding, detouring around the pillars and concentrating on holes in the next laminate. The maximum heat transfer quantity occurs near the impingement stagnation regions in the plates.

关 键 词：多孔多层板 发散冷却 燃气轮机 直通道 压缩比 

分 类 号：TK264.1[动力工程及工程热物理—动力机械及工程] V231.1[航空宇航科学与技术—航空宇航推进理论与工程]