| 冲击/发散冷却壁温分布和冷却效率研究 |
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| 引用本文： | 胡超,许全宏,徐剑,林宇震.冲击/发散冷却壁温分布和冷却效率研究[J].航空动力学报,2008,23(10):1800-1804. |
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| 作者姓名： | 胡超 许全宏 徐剑 林宇震 |
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| 作者单位： | 北京航空航天大学,能源与动力工程学院,航空发动机气动热力国防科技重点实验室,北京,100191 |
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| 摘 要： | 针对高温升燃烧室长寿命火焰筒的要求,实验研究了孔排列方式、发散壁壁厚与孔径之比以及单位面积开孔率对壁温分布和冷却效率的影响.实验中冷却气为常温常压,主流速度20m/s, 发散壁孔内气流与主流速度比为0.63, 主流与冷却气温度比为1.6.实验结果表明:长菱形排布与正菱形排布相比冷却效率更高,但孔的排布方式对于壁温分布的影响较小;增大发散壁壁厚与孔径比可以增强冷却效果,并使壁温分布变得均匀;而减小单位面积开孔率对于壁温分布的影响较小,同时冷却效率也会降低.
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| 关 键 词： | 壁温分布 冷却效率 燃烧室 冲击/发散 火焰筒 |
| 收稿时间： | 2007/9/20 0:00:00 |
| 修稿时间： | 2007/11/26 0:00:00 |
Investigation of the wall temperature distribution and cooling efficiency for impingement/effusion cooling scheme |
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| HU Chao,XU Quan-hong,XU Jian and LIN Yu-zhen.Investigation of the wall temperature distribution and cooling efficiency for impingement/effusion cooling scheme[J].Journal of Aerospace Power,2008,23(10):1800-1804. |
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| Authors: | HU Chao XU Quan-hong XU Jian and LIN Yu-zhen |
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| Affiliation: | HU Chao,XU Quan-hong,XU Jian,LIN Yu-zhen(National Key Laboratory on Aero-Engines,School of Jet Propulsion,Beijing University of Aeronautics , Astronautics,Beijing 100191,China) |
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| Abstract: | In order to meet long-duration requirements of high-temperature combustor liner,impingement/ effusion cooling scheme was investigated experimentally in the following aspects: the influence of the hole arrangements,the ratio of the wall thickness to the hole diameter,and the opening rate per unit area on the overall cooling effectiveness and wall temperature distribution.The condition of cooling air was under atmospheric temperature and pressure.The velocity of the main flow was 20 m/s.The velocity ratio of ... |
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| Keywords: | wall temperature distribution cooling efficiency combustor impingement/effusion liner |
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