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中国电机工程学报 2007, 27(35) 108-112 DOI:
ISSN: 0258-8013 CN: 11-2107/TM |
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脉动流条件下带突起内翅片管强化传热数值研究脉动流带突起内翅片管强化传热数值研究 |
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吴峰 王秋旺 |
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西安石油大学石油工程学院 动力工程多相流国家重点实验室(西安交通大学) |
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摘要：
对一种周期性带突起纵向内翅片管通道内的流动与传热特性进行了非稳态三维数值模拟。分析了带突起内翅片管通道在进口流速呈正弦波脉动流时其横截面二次涡流在1个脉动周期内的变化规律；得到了内翅片管平均Nu数及阻力系数f在一个脉动流动周期内的变化规律；同时进一步计算分析了不同脉动流脉动频率对内翅片管传热性能及阻力性能的影响。研究表明：在脉动流动的影响下纵向内翅片管的传热能力得到强化，随着脉动频率的增加，纵向内翅片管传热系数的增大幅度逐渐大于阻力系数。 |
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关键词：
带突起纵向内翅片管
脉动流动
强化传热
数值模拟
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Numerical Simulation on Heat Transfer Enhancement Inside Internally Longitudinal Protuberant Finned Tube Under Pulsating Flow |
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Abstract:
The turbulent pulsating flow and heat transfer in an internally longitudinal protuberant finned tube was numerically investigated by solving unsteady three-dimensional elliptical Navier-Stokes equations. The realized k-e turbulent model was adopted. The dynamic behaviors of velocity flied, average Nusselt number and friction number of the internally longitudinal protuberant finned tube were numerically analyzed in a pulsating period, and it was further investigated by changing the frequency of the pulsating flow. It was found that the intensity of heat transfer enhancement increases with increase of pulsating frequency, while the pressure drop will be increased simultaneously, the intensification of heat transfer in internally longitudinal protuberant finned tube are gradually better than pressure drop with increase of pulsating frequency. |
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Keywords:
internally longitudinal protuberant finned tube
pulsating flow
heat transfer enhancement
digital low-pass filter
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收稿日期 2007-04-03 修回日期 1900-01-01 网络版发布日期 |
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DOI: |
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基金项目:
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通讯作者: 吴峰 |
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作者简介: |
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作者Email: wufeng97@mail.xjtu.edu.cn;wufeng@xsyu.edu.cn |
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| Copyright by 中国电机工程学报 |
