摘要
优化透平冷却设计已经成为燃气轮机研究领域的一个重要课题,其中旋流室属于一个很有前景的冷却概念。主要利用FLUENT14.5对旋流室进行数值模拟,探究旋流室进口尺寸参数、进口平均温度与壁面平均温度之比以及进口雷诺数对旋流室强化传热的影响。采用控制变量法,得出如下结论:在本文给定的范围内,进口高度为15mm时传热效果最好,进口宽度越大传热效果越好,进口宽高比为15时传热效果最好,温比越小传热效果越好,雷诺数越大传热效果越好。此外,对进口尺寸、温比、雷诺数对传热系数以及流阻系数的影响也作了研究。
The optimization of turbine cooling design has become a new research field of gas turbine （GT）. The swirl chamber is a prospect cooling concept. In this paper, the the numerical simulation of the swirl chamber is carried out by FLUENT14.5, swirl chamber inlet size parameters of inquiry, and the influence of inlet size parameters, inlet average temperature and inlet Reynolds number on the enhanced heat transfer of swirl chamber is studied. The results show that, in the range of the studied condition, the heat transfer effect is the best when the height of the inlet is 15mm. It also shows that the larger inlet width the better heat transfer, and the heat transfer effect is the best when the ratio of inlet width to height is 15. The heat transfer effect is increased with the decrease of the ratio of inlet to wall and increase of the bigger the Reynolds number. In addition, this paper also discusses the effect of inlet size, temperature, reynolds number on the heat transfer coefficient and flow resistance coefficient.
出处
《汽轮机技术》
北大核心
2016年第2期105-108,共4页
Turbine Technology
关键词
旋流室
进口尺寸参数
温比
雷诺数
传热效果
swirl chamber
inlet parameters
temperature ratios
Reynolds number
heat transfer effect
