| 水平冷表面上结霜发生随机性研究 |
| |
| 引用本文： | 张秋芳,段远源,曲凯阳. 水平冷表面上结霜发生随机性研究[J]. 低温工程, 2003, 0(1): 13-16,28 |
| |
| 作者姓名： | 张秋芳 段远源 曲凯阳 |
| |
| 作者单位： | 清华大学热能工程系,北京,100084;清华大学建筑学院建筑技术科学系,北京,100084 |
| |
| 基金项目： | 国家自然科学基金 (5 0 136 0 2 0 ),高等学校优秀青年教师教学科研奖励计划资助项目 |
| |
| 摘 要： | 水蒸气在冷壁面上的结霜是制冷、低温领域普遍存在的问题。过饱和的水蒸气有两种相变途径,一种是气液固相变;一种是直接气固相变。气液固相变经历气液相变和液固相变两个阶段,实验研究表明其发生具有随机性。在前人实验研究的基础上,从理论上给出了液珠半径随时间的增长规律,并进一步得到了冷壁面自然对流情况下结霜发生概率随时间的变化关系式。
|
| 关 键 词： | 冷凝 合并 水珠长大 随机性 |
STUDY ON THE RANDOMNESS OF FROST FORMATION ON A COLD FLAT SURFACE |
| |
| Zhang Qiufang Duan Yuanyuan Qu Kaiyang. STUDY ON THE RANDOMNESS OF FROST FORMATION ON A COLD FLAT SURFACE[J]. Cryogenics, 2003, 0(1): 13-16,28 |
| |
| Authors: | Zhang Qiufang Duan Yuanyuan Qu Kaiyang |
| |
| Affiliation: | Zhang Qiufang 1 Duan Yuanyuan 1 Qu Kaiyang 2 |
| |
| Abstract: | Frosting on a cold surface is a common phenomenon in cryogenic fields.There are two paths of phase change for supersaturation vapor,one of which is vapor liquid solid phase change and the other is directly vapor solid phase change.The phase change of vapor liquid solid can be divided into two steps:vapor liquid phase change and liquid solid phase change.This whole process of vapor liquid solid phase change happens with randomness,which was indicated by former experimental observations.Based on the available experimental result,this paper developed a formula to describe the growth of liquid drop radius with time and furthermore studied the randomness of frost formation on a cold surface under the natural convection condition. |
| |
| Keywords: | condensation combination the growth of liquid drop randomness |
| 本文献已被 CNKI 维普 万方数据 等数据库收录！ |
