| 冲击-多斜孔复合冷却中冲击孔与多斜孔面积比对换热特性的影响研究 |
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| 引用本文： | 张勃,吉洪湖.冲击-多斜孔复合冷却中冲击孔与多斜孔面积比对换热特性的影响研究[J].航空动力学报,2009,24(10). |
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| 作者姓名： | 张勃 吉洪湖 |
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| 作者单位： | 南京航空航天大学 能源与动力学院,南京航空航天大学 能源与动力学院 |
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| 摘 要： | 用数值计算的方法研究了冲击-多斜孔壁复合冷却方式的冷却特性，在保证当量开孔面积相同且压降相同的前提下，研究了冲击孔壁与多斜孔壁开孔面积比 变化对冷却特性的影响。研究发现，随着冲击孔与多斜孔开孔面积比减小，多斜孔壁气膜出流速度降低，气膜覆盖增强，冲击换热系数呈增大趋势，使得模型冷却效果增强；多斜孔壁热侧、冷侧与多斜孔孔内换热量随开孔面积比减小而减小，多斜孔内换热量在模型总体换热量中所占比例逐渐增加。
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| 关 键 词： | 冲击-多斜孔，燃烧室，冷却，压降分配，开孔面积比 |
| 收稿时间： | 10/8/2008 5:34:08 PM |
| 修稿时间： | 6/8/2009 1:59:54 PM |
The Effect of Area Ratio of Impingment hole to Effusion hole on Heat Transfer Characteristics of Impingement-Effusion composite Cooling |
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| zhang Bo and Ji Hong-hu.The Effect of Area Ratio of Impingment hole to Effusion hole on Heat Transfer Characteristics of Impingement-Effusion composite Cooling[J].Journal of Aerospace Power,2009,24(10). |
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| Authors: | zhang Bo and Ji Hong-hu |
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| Institution: | Nanjing University of Aeronautics and Astronautics College of Energy and Power enginering,Nanjing University of Aeronautics and Astronautics College of Energy and Power enginering |
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| Abstract: | The influence of area ratio to heat transfer characteristics of impingement-effusion double wall was investigated numerically, in the precondition of the same equivalent hole area. Results showed that with the decreasing of area ratio of impinging hole to effusion hole, film flow velocity decreases, impinge cooling heat flux increases, and the cooling effectiveness enhances. The heat fluxes of hot side wall, cold side wall, and effusion hole wall all decrease with the area ratio, but the last one decreases least, and its quotient among the total heat flux increases. |
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| Keywords: | impingment/inclined combustor cooling pressure drop hole area ratio |
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