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| 冲击+同向对流+气膜冷却效果的试验 | |
| 引用本文： | 杨卫华,王梅娟,丁有红,张靖周.冲击+同向对流+气膜冷却效果的试验[J].航空动力学报,2010,25(4):729-734. |
| 作者姓名： | 杨卫华 王梅娟 丁有红 张靖周 |
| 作者单位： | 1. 南京航空航天大学,能源与动力学院,南京,210016;中国航空工业集团公司,中国航空动力机械研究所,株洲,412002 2. 中国航空工业集团公司,中国航空动力机械研究所,株洲,412002 3. 南京航空航天大学,能源与动力学院,南京,210016 |
| 基金项目： | 国家自然科学基金，中国博士后科学基金 |
| 摘 要： | 为了研究火焰筒壁面冲击+同向对流+气膜复合冷却方式的冷却效果,设计了多种不同几何结构的试验件,采用红外热像仪对冷却壁温进行测量.研究结果表明,冷却效率随吹风比的增加而增大.沿冷却壁面,冷却效率呈波浪型分布.在气膜出口附近区域和冲击驻点区域冷却效率最高.在冲击驻点区域后,冷却效率的下降较为缓慢.冷却效率随冲击间距的减小而增大. |
| 关 键 词： | 航空发动机 火焰筒 冲击冷却 气膜冷却 对流换热 |
| 收稿时间： | 2009/3/10 0:00:00 |
| 修稿时间： | 2009/7/14 0:00:00 |
Experimental study of cooling effectiveness of impingement/cocurrent convection/film cooling |
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| YANG Wei-hu,WANG Mei-juan,DING You-hong and ZHANG Jing-zhou.Experimental study of cooling effectiveness of impingement/cocurrent convection/film cooling[J].Journal of Aerospace Power,2010,25(4):729-734. | |
| Authors: | YANG Wei-hu WANG Mei-juan DING You-hong and ZHANG Jing-zhou |
| Institution: | College of Energy and Power Engineering, Nanjing University of Aeronautics and Astronautics, Nanjing 210016, China;China Aviation Powerplant Research Institute, Aviation Industry Corporation of China, Zhuzhou 412002, China;China Aviation Powerplant Research Institute, Aviation Industry Corporation of China, Zhuzhou 412002, China;China Aviation Powerplant Research Institute, Aviation Industry Corporation of China, Zhuzhou 412002, China;College of Energy and Power Engineering, (Nanjing University of Aeronautics and Astronautics, Nanjing 210016, China; |
| Abstract: | In order to study the heat transfer characteristics of impingement/cocurrent convection/film double cooling,several test pieces were designed.The experimental results show that the cooling efficiency increases with the growing blowing ratio;the distribution of cooling efficiency is wavy on the cooling wall.The cooling efficiency is higher in the areas of cooling film exit and the impingement stagnant point.The decrease of cooling efficiency is weakened behind the impingement stagnant point.Cooling efficiency increases with the decrease of impingement space. |
| Keywords: | aero-engine flame tube impinging cooling film cooling convective heat transfer |
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