摘要：A new CHF model was developed for saturated pool boiling on surfaces with micro-scale roughness, including micro-pillar, micro-ridge structures as well as random roughness made by emery paper or sandpapers. The model accounted for the effects of roughness-augmented wettability and capillary wicking on CHF enhancement. Geometric size parameters of well-defined micro structures were explicitly included in the correlation of present model, which was then extended to include randomly roughened surfaces based on the equivalent geometric sizes obtained from roughness parameter, Ra. The present model was evaluated by comparing with 104 CHF data in literatures with different working fluids, surface materials and surface morphologies. The results showed that present model could match most of the data within 25% and the overall mean absolute error was 13.7%. Particularly, the present model was capable of predicting the decrease trend of CHF with increase of roughness factor appeared in experimental studies and this trend was not reflected in previous models. The present study was expected to improve the understanding of CHF augmentation mechanism on micro-structured surfaces and to provide guidelines for optimal surface design. (C) 2017 Elsevier Ltd. All rights reserved.

关键字：Critical heat flux Roughness Wettability Capillary wicking Model

ISSN号：0017-9310

卷、期、页：卷: 109 页: 1084-1093

发表日期：2017-06-01

影响因子：3.458000

期刊分区（SCI为中科院分区）：二区

收录情况：SCI（科学引文索引印刷版）,ESI（基本科学指标数据库）,EI（工程索引）,SCIE（科学引文索引网络版）

发表期刊名称：INTERNATIONAL JOURNAL OF HEAT AND MASS TRANSFER

通讯作者：李冉

第一作者：黄中伟

论文类型：期刊论文

论文概要：李冉,黄中伟，A new CHF model for enhanced pool boiling heat transfer on surfaces with micro-scale roughness，INTERNATIONAL JOURNAL OF HEAT AND MASS TRANSFER，2017，卷: 109 页: 1084-1093

论文题目：A new CHF model for enhanced pool boiling heat transfer on surfaces with micro-scale roughness