• CN:11-2187/TH
  • ISSN:0577-6686

›› 2012, Vol. 48 ›› Issue (12): 144-149.

• 论文 • 上一篇    下一篇

致密多孔层板冷却结构研究

谭晓茗;李业芳;张靖周   

  1. 南京航空航天大学能源与动力学院
  • 发布日期:2012-06-20

Numerical Investigation on Structures of Lamilloy

TAN Xiaoming;LI Yefang;ZHANG Jingzhou   

  1. College of Energy and Power Engineering, Nanjing University of Aeronautics and Astronautics
  • Published:2012-06-20

摘要: 应用FLUENT软件对内部绕流形式不同的7种层板结构进行流动与换热的耦合计算,分析扰流柱、冲击孔、气膜孔之间的排布方式以及堵塞比等参数对层板冷却效率与相对压力损失的影响规律。研究表明,层板结构以冲击孔和气膜孔呈现长菱形分布、扰流柱呈梭子形排布的方式较好,压力损失小,综合冷却效率可以提高10%左右;在进气流量相同的情况下,不同的层板结构压力损失相差不大,压力损失主要发生在从环腔经气膜壁进入火焰筒流出的过程中;增加扰流柱的数量或者是增大扰流柱的直径都会带来堵塞比的增大,层板的相对压力损失会随之增加,综合冷却效率增大,一定程度上强化了换热。

关键词: 层板结构, 堵塞比, 冷却效率, 数值模拟, 压力损失

Abstract: Conjugate numerical simulation of fluid and solid zones is carried out with FLUENT software for seven different lamilloy configurations. Arrays of pin-fins、impinging holes and film holes and different parameters of pin-fins, such as the stuff ration are studied to reveal the overall cooling efficient and pressure loss coefficient. The results show that good structure of lamilloy with higher cooling efficiency and lower pressure loss coefficient is the structure with long-diamond impinging jet holes array and long–shuttle pin-fins array. With the same flux of cooling air, the pressure loss of different structures of lamilloy is almost the same. The second flow going through film holes brights higher pressure loss. Increasing the amount of pin-fins or increasing the size of diameter could bring the increasing of pressure loss and cooling efficient, which is one way of heat transfer strengthen.

Key words: Cooling efficiency, Lamilloy, Numerical simulation, Pressure loss, Stuff ratio

中图分类号: