| 密集型阵列冲击射流换热特性实验 |
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| 引用本文： | 王磊,张靖周,杨卫华.密集型阵列冲击射流换热特性实验[J].航空动力学报,2009,24(6):1264-1269. |
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| 作者姓名： | 王磊 张靖周 杨卫华 |
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| 作者单位： | 南京航空航天大学,能源与动力学院,南京,210016 |
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| 基金项目： | 航空科学基金(03C52019) |
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| 摘 要： | 设计了多种不同几何参数的阵列射流冲击孔实验件,利用红外热像仪对其冲击冷却进行了热像显示实验,获得了冲击射流雷诺数和几何参数对局部对流换热特性的影响规律.结果表明:①对流换热系数随着射流雷诺数Rej的增加而逐渐增大;②随着孔间距的或者冲击间距的增大,冲击冷却的对流换热效果逐渐减弱;③当孔间距与孔径之比在3~5时,顺排阵列射流的强化换热效果优于叉排,而当孔间距与孔径之比为2时,在阵列射流上游叉排排布的强化换热效果优于顺排,而在下游则顺排排布的强化换热效果占优.
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| 关 键 词： | 冲击冷却 阵列射流 强化对流换热 |
| 收稿时间： | 2008/5/30 0:00:00 |
| 修稿时间： | 2009/1/12 0:00:00 |
Experimental research on heat transfer characteristics of denser jet array impingement |
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| WANG Lei,ZHANG Jing-zhou and YANG Wei-Hua.Experimental research on heat transfer characteristics of denser jet array impingement[J].Journal of Aerospace Power,2009,24(6):1264-1269. |
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| Authors: | WANG Lei ZHANG Jing-zhou and YANG Wei-Hua |
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| Institution: | College of Energy and Power Engineering;Nanjing University of Aeronautics and Astronautics;Nanjing 210016;China |
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| Abstract: | Several jet array impingement experimental models with different holes spacing were designed to investigate the effects of impinging jet Reynolds number and geometry parameters on the local heat transfer enhancement by using the transient Infrared thermography method.The results show that:(1)the heat transfer coefficient increases with the increasing of impinging jet Reynolds number,(2)the heat transfer enhancement becomes weaken when the jet holes spacing or jet impinging distance increase,and(3) in the ca... |
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| Keywords: | impingement cooling jet array convective heat transfer enhancement |
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