| 非牛顿流体在周期性渐扩渐缩通道内层流流动与换热的实验研究 |
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| 引用本文： | 徐佳莹,马雅玲,杨小玉,陶文铨. 非牛顿流体在周期性渐扩渐缩通道内层流流动与换热的实验研究[J]. 工程热物理学报, 2000, 21(2): 206-209 |
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| 作者姓名： | 徐佳莹 马雅玲 杨小玉 陶文铨 |
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| 作者单位： | 西安交通大学能源与动力工程学院,陕西,西安,710049 |
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| 基金项目： | 高等学校博士学科点专项科研基金!9569801 |
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| 摘 要： | 本文用实验方法研究了浓度为１５００ｗｐｐｍ的聚丙烯酰胺（ＰＡＭ）溶液在周期性渐扩渐缩通道内层流流动与换热问题。研究表明，大约经过８个周期后流动进入充分发展阶段，而换热则要经过大约２０个周期后才能进入充分发展阶段。在充分发展阶段，阻力系数和换热Ｎｕｓｓｅｌｔ数随广义 Ｒｅｙｎｏｌｄｓ数的变化关系式分别为： ｆ＝ １３５ × Ｒｅ＊－０．６３２和 Ｎｕ＝ １０．５ × Ｒｅ＊０．５９８。
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| 关 键 词： | 非牛顿流体 周期性渐扩渐缩通道 充分发展 |
| 文章编号： | 0253-231X(2000)02-0206-05 |
| 修稿时间： | 1999-12-10 |
EXPERIMENTAL STUDY ON LAMINAR FLOW AND HEAT TRANSFER OF NON-NEWTONIAN FLUID IN PERIODICALLY CONVERGING-DIVERGING CHANNEL |
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| XU Jiaying,MA Yaling,YANG Xiaoyu,TAO Wenquan. EXPERIMENTAL STUDY ON LAMINAR FLOW AND HEAT TRANSFER OF NON-NEWTONIAN FLUID IN PERIODICALLY CONVERGING-DIVERGING CHANNEL[J]. Journal of Engineering Thermophysics, 2000, 21(2): 206-209 |
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| Authors: | XU Jiaying MA Yaling YANG Xiaoyu TAO Wenquan |
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| Affiliation: | XU Jiaying,MA Yaling,YANG Xiaoyu,TAO Wenquan(School of Energy and Power Engineering, Xi'an Jiaotong University, Shanxi Xi'an 710049, China) |
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| Abstract: | The laminar flow and heat transfer characteristics of a non--newtonian fluid in periodically converging--diverging channel was investigated experimelltally. The non-Newtonian fluid was PAM with the concentration of 1500 wppm. It was found that the fluid flow of the chafinel became fully--developed after about & periods, while the heat transfer of the fluid became fully-developed after 20 periods. In the range of modified Reynolds numbers Re* 2.5 55, the correlations of the friction factor and the Nusselt numbers vs Re* were f = 135 x Re*-0.632 and Nc 10.5 x Re*0.598 respectively. |
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| Keywords: | non-Newtonian fluid periodically converging-diverging channel fully-developed |
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