| 矩形通道内混合对流入口段阻力特性的实验研究 |
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| 引用本文： | 张颖莉,种道彤,刘继平,胡党辉.矩形通道内混合对流入口段阻力特性的实验研究[J].中国电机工程学报,2011,31(29). |
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| 作者姓名： | 张颖莉 种道彤 刘继平 胡党辉 |
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| 作者单位： | 1. 西安交通大学能源与动力工程学院,陕西省西安市,710049
2. 陕西省电力公司物资总公司,陕西省西安市,710068 |
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| 基金项目： | 国家重点基础研究发展计划项目(973项目)(2009CB219803); 新世纪优秀人才支持计划项目(NCET-08-0441)~~ |
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| 摘 要： | 通过实验研究中心截面沿主流方向带有均匀加热平板的矩形通道混合对流入口段的阻力特性，得到Re数、Gr^＊数和倾斜角度对阻力系数的影响。实验结果表明：阻力系数随倾斜角度｜θ｜的增大而增大，在RP数的不同范围内呈不同的特性。Re数小于1500时，阻力系数随Re数的增大而减小，随G^＊数的增大而增大。当Re大于1500时，阻力系数受Re数和G^＊数的影响很小。综合考虑JRP数、Gr^＊数、倾斜角度及管道长径比的影响，对Re数大于1500和小于1500分别给得出了阻力系数的关联式，该组关联式与实验数据吻合良好，偏差小于10％。
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| 关 键 词： | 矩形通道 混合对流 倾斜角度 阻力系数 关联式 |
Experimental Investigation on the Flow Resistance Characteristic of the Entrance Region of Mixed Convection in Rectangular Channel |
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| ZHANG Yingli,CHONG Daotong,LIU Jiping,HU Danghui.Experimental Investigation on the Flow Resistance Characteristic of the Entrance Region of Mixed Convection in Rectangular Channel[J].Proceedings of the CSEE,2011,31(29). |
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| Authors: | ZHANG Yingli CHONG Daotong LIU Jiping HU Danghui |
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| Affiliation: | ZHANG Yingli1,CHONG Daotong1,LIU Jiping1,HU Danghui2(1.School of Energy and Power Engineering,Xi'an Jiaotong University,Xi'an 710049,Shaanxi Province,China,2.Shaanxi Electric Power Company,Xi'an 710068,China) |
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| Abstract: | The flow resistance characteristic of the entrance region of mixed convection in rectangular channel was studied by the experiment of the air flowed through a rectangular duct with a uniformly heated plate in the middle section.The rules of the friction factors variation connected with the Reynolds number,the Grashof numbers and inclination angles were obtained.The results reveal that when Re is less than 1 500,the friction factor increases with Re and decreases with Gr*.Moreover,when the Re is greater than... |
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| Keywords: | rectangular duct mixed convection inclination angle friction factors correlation |
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