| 旋转对复合角度气膜冷却叶片的数值模拟 |
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| 引用本文： | 李少华,李知骏,王梅丽,郭婷婷. 旋转对复合角度气膜冷却叶片的数值模拟[J]. 汽轮机技术, 2011, 53(3) |
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| 作者姓名： | 李少华 李知骏 王梅丽 郭婷婷 |
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| 作者单位： | 1. 东北电力大学,吉林,132012
2. 北京国电龙源环保工程有限公司,北京,102206 |
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| 基金项目： | 国家自然科学基金项目(50946040) |
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| 摘 要： | 采用Realizable k-ε紊流模型并结合SIMPLEC算法,对前缘复合角度α=30°、β=45°,α=90°、β=45°的动叶栅在不同旋转状速度下的气膜冷却效率进行计算。分析了不同转速、吹风比、叶片前缘射流角度对气膜冷却效率的影响。计算结果表明:旋转导致冷却射流向叶顶偏移,转速越高气膜冷却效率越低;高转速时叶盆区域有回流涡旋形成;高吹风比使得冷却射流在吸力面的贴壁性变差;比较两种前缘冷气喷射角度的计算结果可以看出,前缘冷却气流喷射角度较小时的气膜冷却效果较好。
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| 关 键 词： | 气膜冷却 非定常尾迹 数值模拟 复合角度 冷却效率 |
Numerical Simulation Study on the Effect of Rotation on Film Cooling of Blades with Compound Angle Holes |
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| LI Shao-hua,LI Zhi-jun,WANG Mei-li,GUO Ting-ting. Numerical Simulation Study on the Effect of Rotation on Film Cooling of Blades with Compound Angle Holes[J]. Turbine Technology, 2011, 53(3) |
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| Authors: | LI Shao-hua LI Zhi-jun WANG Mei-li GUO Ting-ting |
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| Affiliation: | LI Shao-hua1,LI Zhi-jun1,WANG Mei-li1,GUO Ting-ting2(1 Northeast Dianli University,Jilin 132012,China,2 State Power Longyuan Environment Engineering of Beijing,Beijing 102206,China) |
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| Abstract: | Film cooling effectiveness of rotating turbine blades with compound angle holes has been investigated by numerical simulation.Calculations of moving blades under different rotational speed conditions.The effect of rotational velocity,blowing rate and incidence angle of the cooling air jet at leading edge on film cooling have been analyzed.Calculation results show that rotation causes film cooling jet flow skew to blades tip.Cooling effect on the surface to drop the quicker the rotation the lower the cooling... |
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| Keywords: | film-cooling unsteady wakes numerical simulation compound angle cooling effectiveness |
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