| Effect of Pressure Gradient on Heat Transfer of Impinging Submerged Circular Jets |
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| 作者姓名： | DingweiZhou ChongfangMa ManQin |
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| 作者单位： | Dingwei ZhouInstitute of Engineering Thermophysics，Chinese Academy of Sciences，Beijing 100080，ChinaChongfang Ma Man QinCollege of Environmental and Energy Engineering，Beijing Polytechnic University，Beijing 100022，China |
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| 基金项目： | This project is financially supported by the National Natural Science Foundation of China (Grant No.59976002)，the National Key Basic Research Development Program of China (Grant No.G2000026300). |
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| 摘 要： | An experimental and numerical study have been carried out to investigate the distribution of radial local heat transfer coefficients of impinging submerged circular jets. Good agreement is achieved between the experimental results and the predicted value. Results show that the outer peak usually occurs at the radial location of r/d= 1.8~2.0, in which transition from laminar to turbulence happens resulting from disappeared pressure gradient abruptly, and that the inner peak appears rigidly at r/d=0.5, where the boundary layer has a minimum thickness because of elevating pressure gradient.
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| 收稿时间： | 15 March 2007 |
Effect of pressure gradient on heat transfer of impinging submerged circular jets |
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| DingweiZhou
,ChongfangMa
,ManQin.Effect of Pressure Gradient on Heat Transfer of Impinging Submerged Circular Jets[J].Journal of Thermal Science,2002,11(2):180-185. |
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| Authors: | Dingwei Zhou Chongfang Ma Man Qin |
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| Affiliation: | (1) Institute of Engineering Thermophysics, Chinese Academy of Sciences, 100080 Beijing, China;(2) College of Environmental and Energy Engineering, Beijing Polytechnic University, 100022 Beijing, China |
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| Abstract: | An experimental and numerical study have been carried out to investigate the distribution of radial local heat transfer coefficients of impinging submerged circular jets. Good agreement is achieved between the experimental results and the predicted value. Results show that the outer peak usually occurs at the radial location of rld=1.8-2.0, in which transition from laminar to turbulence happens resulting from disappeared pressure gradient abruptly, and that the inner peak appears rigidly at r/d=0.5, where the boundary layer has a minimum thickness because of elevating pressure gradient. |
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| Keywords: | jet impingement heat transfer pressure gradient |
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