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中文
周一卉

Associate Professor
Supervisor of Master's Candidates


Gender:Female
Alma Mater:Dalian University of Technology
Degree:Doctoral Degree
School/Department:Chemical Engineering
Discipline:Safety Science and Engineering
Chemical Process Equipment
Business Address:Room H403,West Dist.,DUT
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Current position: Home >> Scientific Research >> Paper Publications
SCV蛇形换热管内超临界LNG传热特性数值模拟

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Indexed by:Journal Article

Date of Publication:2015-08-28

Journal:化工学报

Included Journals:Scopus、CSCD、ISTIC、PKU、EI

Volume:66

Issue:12

Page Number:4788-4795

ISSN:0438-1157

Key Words:超临界流体;液化天然气;SCV;数值模拟;传热;蛇形换热管

Abstract:LNG沉浸式汽化器在液化天然气接收站应用广泛,管内超临界LNG的传热特性对SCV运行有重要影响,为此,建立了单根蛇形换热管内 LNG 流动传热过程的数值计算模型.分析了管程压力、热通量、入口速度及物性变化对管内流体温度与局部传热系数的影响规律.计算结果表明,局部传热系数沿流动方向呈先增大后减小的趋势,并在准临界点附近达到峰值;由于二次流现象,传热系数在弯管处发生突变.在操作压力范围内,压力越大,局部传热系数峰值越小;热通量越大,局部传热系数峰值越早出现,峰值过后系数下降越快,出现传热恶化现象;而入口速度越大,局部传热系数越大,其峰值出现位置越靠后.该数值模拟结果可为 LNG 沉浸式汽化器的设计提供参考.