化工学报2019，Vol.70Issue(z2)：201-207,7.DOI:10.11949/0438-1157.20190492
含不凝气体蒸汽波节管内凝结特性研究
Study on condensation characteristics of vapor with non-condensable gas in corrugated tubes
摘要
Abstract
This paper presents a numerical investigation on the condensation characteristics of vapor with non-condensable gas in corrugated tubes. Several 2D examples with different corrugated structures, air contents and Reynolds numbers are studied and compared. Results show that along with the increase of air content, the wall average heat transfer coefficient decreases in the corrugated tube. The oscillation of fluid flow and heat transfer is generated due to the corrugated structure. With the increasing of wave height, the skin friction coefficient increased, and the wall average heat transfer coefficient first increased, and then decreased, the maximum of wall average heat transfer coefficient in this paper is in 0.032 m. The influence of wave height on the flow and heat transfer characteristics is more obvious than the width of the wave node and the space between two waves. The effect of inlet fluid flow-rate on the skin friction coefficient is also evaluated and discussed to provide some guidelines for future engineering applications.关键词
数值模拟/波节管/不凝气体/管内冷凝/气液两相流/混合物Key words
numerical simulation/ corrugated tubes/ non-condensable gas/ condensation inside tubes/ gas-liquid flow/ mixtures分类
能源科技引用本文复制引用
贾文华,田茂诚,张冠敏,魏民..含不凝气体蒸汽波节管内凝结特性研究[J].化工学报,2019,70(z2):201-207,7.基金项目
国家自然科学基金项目(51676114) （51676114）
山东省自然科学基金项目(ZR2016EEM26) （ZR2016EEM26）
