| 超临界压力下航空煤油RP-3壁面结焦特性对换热的影响 |
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| 引用本文： | 袁立公,邓宏武,徐国强,贾洲侠,李一帆.超临界压力下航空煤油RP-3壁面结焦特性对换热的影响[J].航空动力学报,2013,28(4):832-837. |
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| 作者姓名： | 袁立公 邓宏武 徐国强 贾洲侠 李一帆 |
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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家级重点实验室,北京,100191 |
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| 基金项目： | 国家自然科学基金(50676005) |
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| 摘 要： | 研究了超临界压力下航空煤油(RP-3)在微细管内流动过程中结焦对换热的影响规律.实验中系统压力保持为5 MPa,燃油质量流量为3 g/s.燃油溶解氧达到饱和,实验段进出口油温分别为127℃和450℃,实验时间为60min,并利用“称质法”获得煤油结焦量.结果表明:由于壁面结焦的差异使得换热特性沿实验段可分为3个区域:进口低温段的传热稳定区、结焦峰值处的传热恶化区和出口高温段的短期强化区.进口低温段结焦量较少,对换热的影响可以忽略；结焦峰值处由于其结焦迅速且量大致使管内传热热阻突增,传热系数下降36.1％故出现传热恶化；高温段出现短期强化是由于结焦微粒附着于管壁,增加了其粗糙度而导致近壁面处流体湍动能增大以及由于近壁面高温区域煤油裂解结焦而产生化学吸热量,进而强化换热.随着时间的推移,结焦量不断增多,结焦热阻增加的效应抵消并超过以上两种因素的影响,因此又出现传热恶化.
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| 关 键 词： | 超临界 航空煤油RP-3 微细管 结焦 换热 |
| 收稿时间： | 5/5/2012 12:00:00 AM |
Effects of RP-3 coke deposition on heat transfer under supercritical pressure |
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| YUAN Li-gong,DENG Hong-wu,XU Guo-qiang,JIA Zhou-xia and LI Yi-fan.Effects of RP-3 coke deposition on heat transfer under supercritical pressure[J].Journal of Aerospace Power,2013,28(4):832-837. |
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| Authors: | YUAN Li-gong DENG Hong-wu XU Guo-qiang JIA Zhou-xia and LI Yi-fan |
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| Institution: | National Key Laboratory of Science and Technology on Aero-Engine Aero-thermodynamics, School of Energy and Power Engineering, Beijing University of Aeronautics and Astronautics, Beijing 100191, China;National Key Laboratory of Science and Technology on Aero-Engine Aero-thermodynamics, School of Energy and Power Engineering, Beijing University of Aeronautics and Astronautics, Beijing 100191, China;National Key Laboratory of Science and Technology on Aero-Engine Aero-thermodynamics, School of Energy and Power Engineering, Beijing University of Aeronautics and Astronautics, Beijing 100191, China;National Key Laboratory of Science and Technology on Aero-Engine Aero-thermodynamics, School of Energy and Power Engineering, Beijing University of Aeronautics and Astronautics, Beijing 100191, China;National Key Laboratory of Science and Technology on Aero-Engine Aero-thermodynamics, School of Energy and Power Engineering, Beijing University of Aeronautics and Astronautics, Beijing 100191, China |
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| Abstract: | |
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| Keywords: | supercritical pressure aviation kerosene RP-3 miniature pipe coke deposition heat transfer |
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