| 吴佩霖， 林清宇， 艾鑫， 冯振飞， 李欢.涡发生器对矩形截面螺旋细通道内液体传热与熵产的影响[J].轻工机械,2020,38(1):28-34 |
| 涡发生器对矩形截面螺旋细通道内液体传热与熵产的影响 |
| Effects of Vortex Generator on Heat Transfer and Entropy Generation in Helical Mini Channels with Rectangular Section |
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| DOI：10.3969/j.issn.1005 2895.2020.01.006 |
| 中文关键词: 传热 涡发生器 螺旋细通道 矩形截面 RNGκ ε湍流模型 熵产 |
| 英文关键词:heat transfer vortex generator helical mini channels rectangular section RNGκ ε turbulence model Entropy generation |
| 基金项目:广西自然科学基金资助项目（2014GXNSFBA118051）；广西高校中青年教师基础能力提升项目资助：涡流发生器强化螺旋微细通道传热研究（2019KY0011）；广西石化资源加工及过程强化技术重点实验室主任基金资助项目(2019Z012)。 |
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| 中文摘要: |
| 为探究湍流状态下涡发生器对矩形截面螺旋细通道传热与熵产的影响，课题组采用RNG κ ε湍流模型对内置5种不同涡发生器的螺旋细通道的传热和熵产进行了数值研究。选取的涡发生器结构为具有相同长宽高的矩形、棱形、椭圆形及2种放置方式不同的三角形。在热流密度300 kW/m和雷诺数Re 4 500~12 000的条件下，对内置不同涡发生器的螺旋细通道与光滑螺旋细通道的摩阻系数、努塞尔数、热阻和总熵产进行分析。结果表明：在研究的雷诺数范围内，5种加入涡发生器结构的通道内流体努塞尔数、摩阻系数均大于光滑通道，热阻均低于光滑通道；当Re<7 500时总熵产率均低于光滑通道，而7 500<Re<12 000时反之。几种涡发生器结构中矩形涡发生器结构能源利用率最佳。 |
| 英文摘要: |
| In order to investigate the effects of vortex generator on heat transfer and entropy generation in helical mini channels with rectangular section under turbulent condition, the numerical investigation of the heat transfer and entropy generation in helical mini channel with 5 types of vortex generator was performed by using RNG κ ε turbulence model. The selected vortex generator structures are a rectangle, a prism, an ellipse and two triangles with different placement which having the same length, width and heigh. Under the conditions of heat flux 300 kW/m and Reynolds number 4 500~12 000, the friction factor, Nusselt number, thermal resistance and entropy generation in helical mini channels equipped with different vortex generators and a smooth helical mini channel were analyzed. The results show that within the range of Reynolds numbers, the Nusselt number and friction factor of the five channels equipped with vortex generator are larger than those of smooth channel, and the thermal resistance is lower than that of smooth channel. When Re<7 500, the entropy generation of 5 channels with vortex generators are lower than that of the smooth channel, while these trends is inversed when 7 500<Re<12 000. Among several vortex generators, the rectangular vortex generator showed the best rate of energy utilization. |
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