文档介绍：中国工程热物理学会传热传质学
学术会议论文编号:123119
卧式螺旋管内沸腾起始点的实验研究国家自然科学基金(51076084)和教育部博士点基金(20090131110035)资助项目
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孔令健,韩吉田*,陈常念,窦鹏程
(山东大学能源与动力工程学院制冷与低温研究所,山东济南,250061)
Tel:0531-88399060 Email:******@sdu.
摘要:对R134a在卧式螺旋管内过冷沸腾的起始点进行了实验研究。在质量流速为324~424kgm-2s-1,~-2,~℃,~。,螺旋直径300mm,节距45mm,。分析了质量流速、入口过冷度、热流密度、系统压力对过冷沸腾起始点的影响。
关键词:过冷沸腾,卧式螺旋管,起始点,R134a
An experimental investigation of onset of nucleate boiling in horizontal helical coils
Kong lingjian,Han jitian,Chen changnian,Dou pengcheng
(School of Energy and Power Engineering, Shandong University, Jinan, 250061)
Abstract:This paper presents an experimental investigation on onset of nucleate boiling of R134a in helical coils. The experiments were carried out in the following range of operational parameters: mass flux G from 324 to 424 kgm-2s-1; heat flux q from kwm-2; entrance subcooled Tsub from to ℃;and pressure p from to MPa. The tube inner and the coil diameters were and 300mm, respectively. The pitch of helical coil was 45mm and the heating length was effects of mass flux, heat flux,entrance subcooled,and pressure on the onset of the nucleate boiling are analyzed.
Keywords:subcooled boiling,horizontal helical coils,onset of the nucleate boiling,R134a
过冷流动沸腾换热过程广泛存在于能源动力、核反应堆、化工、国防、航天等领域。如