| 多斜孔壁与机加环气膜冷却燃烧室面换热特性数值研究 |
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| 引用本文： | 张勃,吉洪湖,杨芳芳,郑妹,程明.多斜孔壁与机加环气膜冷却燃烧室面换热特性数值研究[J].航空动力学报,2012,27(4):832-836. |
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| 作者姓名： | 张勃 吉洪湖 杨芳芳 郑妹 程明 |
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| 作者单位： | 1.南京航空航天大学 能源与动力学院, 南京 210016 |
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| 摘 要： | 数值研究了在燃烧室实际工作条件下,多斜孔壁冷却燃烧室和机加环气膜冷却燃烧室的流动、换热特性,比较分析了内、外壁温度场以及冷却流量的变化.研究发现,采用多斜孔壁后,壁面冷却效果得到强化,相比机加环气膜冷却燃烧室,燃烧室前段壁温略有升高,而后段受到气膜冷却效果增强的影响,壁面温度有所降低,壁面温度梯度明显减小.流量系数明显减小,冷却空气量降低23%,用于组织燃烧用气量增加.多斜孔壁冷却技术可以为高温升燃烧室的发展提供有效的冷却技术.
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| 关 键 词： | 多斜孔壁冷却 燃烧室 高温升 强化换热 流量系数 |
| 收稿时间： | 2011/5/11 0:00:00 |
| 修稿时间： | 2012/2/24 0:00:00 |
Numerical investigation of heat transfer characteristics of effusion cooling and machinery film cooling combustors |
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| ZHANG Bo,JI Hong-hu,YANG Fang-fang,ZHENG Mei and CHENG Ming.Numerical investigation of heat transfer characteristics of effusion cooling and machinery film cooling combustors[J].Journal of Aerospace Power,2012,27(4):832-836. |
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| Authors: | ZHANG Bo JI Hong-hu YANG Fang-fang ZHENG Mei and CHENG Ming |
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| Institution: | 1.College of Energy and Power Engineering, Nanjing University of Aeronautics and Astronautics, Nanjing 210016, China2.System Engineering Department, Shenyang Aeroengine Research Institute, Aviation Industry Corporation of China, Shenyang 110085, China |
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| Abstract: | The flowing and heat transfer characteristics of machinery film cooling and effusion cooling combustors were numerically investigated.The results show that in the effusion combustor,heat transfer is enhanced,and temperature of the front wall of combustor increases,while temperature of the back wall decreases,which cause the temperature gradient decrease.The flow efficiency decreases;the amount of cooling gas is reduced by 23% compared with the machinery one. |
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| Keywords: | effusion cooling combustor high temperature arising heat transfer enhancement flow coefficient |
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