流体机械2026，Vol.54Issue(3)：39-46,8.DOI:10.3969/j.issn.1005-0329.2026.03.005
超临界LNG高压气化器微通道结冰研究
Research on micro-channel freezing in supercritical LNG high-pressure vaporizer
摘要
Abstract
Aiming at the freezing problem on the hot side of the high-pressure vaporizer,a core component of the Fuel Gas Supply System(FGSS)for dual-fuel power vessels,a three-dimensional numerical model with dual channels was established for the high-pressure vaporizer to simulate the flow and heat transfer processes of supercritical liquefied natural gas(LNG)and 50%ethylene glycol aqueous solution.Parametric analyses were carried out to investigate the effects of inlet temperature and flow rate on the hot-side freezing behavior for both the cold side(supercritical LNG)and the hot side(50%ethylene glycol aqueous solution).The numerical results show that under the 1∶1 alternating arrangement of cold and hot plates,freezing is prone to occur in the outlet region of the hot side,especially at the channel corners,leading to a decrease in the Nusselt number(Nu)and a 16%increase in flow resistance in the frozen sections.The reduction in inlet velocity(from 3.0 m/s to 0.5 m/s)and temperature(from 328 K to 308 K)on the hot side,as well as the increase in inlet velocity(from 0.5 m/s to 2.5 m/s)and the decrease in temperature(from 130 K to 110 K)on the cold side,all contribute to the thickening of the ice layer.Severe freezing occurs when the inlet velocity of the cold side is higher than that of the hot side,with the ice layer occupying up to 81.6%of the outlet channel cross-sectional area,which significantly elevates the risk of freeze blockage in the heat exchanger.The quantitative analysis model for freezing behavior under the coupling effect of multiple parameters established in this study provides a theoretical basis for the optimal structural design of anti-icing configurations for LNG high-pressure vaporizers.关键词
印刷电路板式换热器/气化器/液化天然气/结冰/数值模拟Key words
printed circuit board type heat exchanger(PCHE)/vaporizer/liquefied natural gas(LNG)/freeze/numerical simulation分类
机械制造引用本文复制引用
董丹丹,陈永东,于改革,韩冰川..超临界LNG高压气化器微通道结冰研究[J].流体机械,2026,54(3):39-46,8.基金项目
安徽省重点研究与开发技术基础领域项目(2023z04020020) （2023z04020020）
合肥通用机械研究院有限公司青年科技基金项目(2024011182) （2024011182）
安徽省博士后资助项目(2024B825) （2024B825）
中国机械工业集团有限公司科研专项(ZDZX2025-29) （ZDZX2025-29）
