扰流柱直径对倾斜出气孔层板内流动和换热影响的数值研究  

Numerical study on the influences of pin-fin diameter on the flow resistance and heat transfer of leaning vent hole lamilloy

作　　者：陶智[1] 吕东[1] 丁水汀[1] 徐国强[1] 

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重点实验室,北京100083

出　　处：《航空动力学报》2007年第4期540-546,共7页Journal of Aerospace Power

摘　　要：用数值模拟的方法,研究了倾斜出气孔层板结构最小单元体内扰流柱直径对于层板内流阻和换热的影响.采用了非结构化网格,并对气流转角较大区域做了局部加密;选择k-ε湍流模型方程,配以壁面函数率,求解稳态无旋转的层板;采用了流体域与固体域耦合求解法计算耦合换热.给出了计算结果并分析了流动和换热情况.研究结果表明适当增加扰流柱直径有利于降低流阻、提高冷却效率.The influence of pin-fins diameter of minimum elements in the leaning vent hole lamilloy upon the flow resistance and heat transfer was studied through numerical simulation. A locally increased grid density was applied to the bigger area of flow angle with the help of unstructured grid method, κ-ε model equation was used to resolve the steady lamilloy along with fixed wall function. The coupling heat transfer was calculated using fluid area and solid area coupling solution. The calculated results were presented, helping to analyze the flow and heat transfer. The research results show that, proper increase of pin-fins diameter is helpful to decrease the flow resistance and increase the cooling efficiency.

关 键 词：航空 航天推进系统 层板 流阻 换热 出气孔 扰流柱直径 

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]