• CN:11-2187/TH
  • ISSN:0577-6686

›› 1964, Vol. 12 ›› Issue (2): 34-42.

• 论文 • 上一篇    下一篇

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关于临界热绝缘直径的确定

杨世铭   

  1. 西安交通大学
  • 发布日期:1964-03-01

ON THE EVALUATION OF CRITICAI DIAMETER OF THERMAL INSULATION

Yang Shihming   

  1. Xian Jiao-Tong University
  • Published:1964-03-01

摘要: 文章考虑了复合换热条件下放热系数的特点,获得了计算临界热绝缘直径的精确公式。在求解过程中,照顾到对流放热系数与幅射放热系数对直径、温压的不同依变规律,对二种放热系数进行了区别处理。文章提出了一种便捷实用图解法,最后还讨论了一些有兴趣的特例。

Abstract: A set of new formulas for the precise determination of critical diameter of thermal insulation for cylinders and spheres is derived under the condition of simultaneous heat losses by convection and by radiation.Convective and radiative coefficients of heat transfer are treated separately to take care of their difference on their laws of edpendency to diameter and to temperature duop.A convenient graphical method of practical evaluation is presented.In the concluding part of this paper,some interesting particular cases are discussed.