滴状冷凝传热机理的研究  (Ⅱ)液滴分布、液滴生长速率及液滴脱离直径的研究

CIESC Journal

滴状冷凝传热机理的研究 (Ⅱ)液滴分布、液滴生长速率及液滴脱离直径的研究

宋永吉,张东昌,林纪方

大连理工大学化学工程研究所,大连理工大学化学工程研究所,大连理工大学化学工程研究所辽宁,大连 ,辽宁,大连 ,辽宁,大连

出版日期:1990-12-25 发布日期:1990-12-25

Mechanism of Heat Transfer in Dropwise Condensation(Ⅱ) Measurements of Drop-size Distribution, Drop Growth Rate and Drop Departure Diameter

Song Yongji, Zhang Dongchang and Lin Jifang Research Institute of Chemical Engineering, Dalian University of Technology, Liaoning, Dalian

Online:1990-12-25 Published:1990-12-25

摘要/Abstract

摘要： 采用高速摄影方法,实时记录水蒸气在铜基合金表面上的滴状冷凝情况,利用数字图象分析系统对所得图片进行分析,研究了不同条件下的液滴分布函数、液滴生长速率及液滴脱离直径.

Abstract: The processes of dropwise condensation of steam on various copper alloy surfaces were recorded by high speed photography.The obtained negatives were analyzed by digital image processing. The results of drop-size distributions, drop growth rates and drop departure diameters under different conditions were derived, and analyzed. The drop size distribution can be expressed as N(D) = AD-B. It was mainly affected by surface properties and was little affected by operation conditions. The growth rate of a small drop was controlled by steam condensing rate, and coalescence among drops was the dominant reason of big drop growth. The drop departure diameter was determined by condensation surface properties. Operation conditions has little influence on drop departure diameter but had obvious effect on drop growth rate.

宋永吉,张东昌,林纪方. 滴状冷凝传热机理的研究 (Ⅱ)液滴分布、液滴生长速率及液滴脱离直径的研究 [J]. CIESC Journal.

Song Yongji, Zhang Dongchang and Lin Jifang Research Institute of Chemical Engineering, Dalian University of Technology, Liaoning, Dalian. Mechanism of Heat Transfer in Dropwise Condensation(Ⅱ) Measurements of Drop-size Distribution, Drop Growth Rate and Drop Departure Diameter[J]. .