| 不同孔型气膜冷却流场的大涡模拟 |
| |
| 引用本文： | 张玲,李少华,郭婷婷.不同孔型气膜冷却流场的大涡模拟[J].华北电力大学学报,2010,37(2). |
| |
| 作者姓名： | 张玲 李少华 郭婷婷 |
| |
| 作者单位： | 1. 华北电力大学,能源与动力工程学院,北京,102206
2. 东北电力大学,能源与机械工程学院,吉林,吉林,132012 |
| |
| 基金项目： | 国家自然科学基金资助项目(50606005) |
| |
| 摘 要： | 采用大涡模型(LES)模拟了圆形气膜孔和锥形角γ=30°扇形孔在吹风比M=1.0时不同截面上的涡量等值线以及分布特征随时间的变化过程。结果表明:对称面的正反旋涡和垂直截面的马蹄形涡的两翼交替周期性地脱落成新的涡,同一截面扇形气膜孔旋涡生成和脱落的时间比圆形气膜孔的短,冷气射流与主气流掺混剧烈,带走的能量较多,所以壁面的冷却效率高;反向旋涡对气膜冷却流场有重要影响,在同一截面圆形孔的反向涡旋对(CVP)要比扇形孔的大,且涡心位置要比扇形孔的高,因此圆孔对壁面的冷却效果要比扇形孔的差。
|
| 关 键 词： | 气膜冷却 大涡模拟 流场 反向涡旋对 |
Large eddy simulation on field of film cooling with different shaped jet holes |
| |
| ZHANG Ling,LI Shao-hua,GUO Ting-ting.Large eddy simulation on field of film cooling with different shaped jet holes[J].Journal of North China Electric Power University,2010,37(2). |
| |
| Authors: | ZHANG Ling LI Shao-hua GUO Ting-ting |
| |
| Affiliation: | 1.School of Energy and Power Engineering;North China Electric Power University;Beijing 102206;China;2.Institute for Energy and Mechanical Engineering;Northeast Dianli University;Jilin 132012;China |
| |
| Abstract: | Large Eddy Simulation(LES) was performed to investigate the development process of vortices in different sections of a round-shaped hole and a cone-shaped hole with 30o under the condition of blowing rate M=1.0.The results show that the positive and negative vortices in the centreplane and the two wings of the horseshoe vortices in the vertical profiles were shed off new vortices alternately and periodically,the time of shed off of cone-shaped hole's is less than the round-shaped hole's at some profile,the ... |
| |
| Keywords: | film cooling large eddy simulation flow field counter-rotating vortex pair |
| 本文献已被 CNKI 万方数据 等数据库收录！ |
|
