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首页> 外文期刊>International Journal of Heat and Mass Transfer >Natural convection of cold water near its density maximum in an elliptical enclosure containing a coaxial cylinder
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Natural convection of cold water near its density maximum in an elliptical enclosure containing a coaxial cylinder

机译：在带有同轴圆柱体的椭圆形外壳中，冷水的自然对流接近其最大密度

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摘要

A numerical study of natural convection heat transfer of cold water near its density maximum from a heated cylinder to its cooled coaxial elliptical enclosure is performed using finite volume method. The analysis is done for different Rayleigh number ranged from 10~3 to 10~6, density inversion parameter from 0 to 1, aspect ratio from 0.1 to 0.7, and elliptical ratio from 0 to 0.9 to investigate the effects of these parameters on flow and heat transfer characteristics. In addition, the effect of inclination angle is examined as well by turning the enclosure in the clockwise direction. When the stable flow transits to the unstable flow, the mechanism of oscillations is also discussed. Detailed analysis results for the distribution of streamlines, isotherms and Nusselt number are presented and an empirical heat transfer correlation was deduced within an acceptable uncertainty in this paper.
机译：使用有限体积法对冷水在其最大密度附近的自然对流传热进行了数值研究，该热对流是从加热的圆柱体到冷却的同轴椭圆形外壳。针对不同的瑞利数（范围从10〜3到10〜6，密度反演参数从0到1，纵横比从0.1到0.7，椭圆率从0到0.9）进行了分析，以研究这些参数对流量和流量的影响。传热特性。此外，还可以通过沿顺时针方向旋转外壳来检查倾斜角度的影响。当稳定流向不稳定流过渡时，还讨论了振荡机理。给出了有关流线，等温线和Nusselt数分布的详细分析结果，并在可接受的不确定性范围内推导了经验传热相关性。

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  • 作者

    Yu-Peng Hu; You-Rong Li; Xiao-Feng Yuan; Chun-Mei Wu;

  • 作者单位

    Key Laboratory of Low-grade Energy Utilization Technologies and Systems of Ministry of Education, College of Power Engineering, Chongqing University, Chongqing 400044, China;

    Key Laboratory of Low-grade Energy Utilization Technologies and Systems of Ministry of Education, College of Power Engineering, Chongqing University, Chongqing 400044, China;

    Key Laboratory of Low-grade Energy Utilization Technologies and Systems of Ministry of Education, College of Power Engineering, Chongqing University, Chongqing 400044, China;

    Key Laboratory of Low-grade Energy Utilization Technologies and Systems of Ministry of Education, College of Power Engineering, Chongqing University, Chongqing 400044, China;

  • 收录信息 美国《科学引文索引》(SCI);美国《工程索引》(EI);
  • 原文格式 PDF
  • 正文语种 eng
  • 中图分类
  • 关键词

    natural convection; heat transfer; maximum density; elliptic enclosure;

    机译：自然对流;传播热量;最大密度椭圆形外壳;

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