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:123113
卧式螺旋管内干涸CHF特性与极限干度研究
基金项目: 中国博士后科学基金面上资助项目(No. 2011M501129)和国家自然科学基金资助项目(No. 51076084)
陈常念1,孔令健1,韩吉田1,窦鹏程2
1 山东大学能源与动力工程学院制冷与低温工程研究所,山东济南 250061
2 中国广东核电集团有限公司,广东深圳 518028
Tel:********** E-mail:***@sdu.
摘要:为螺旋管加热设备的安全与经济运行提供依据,采用实验研究与理论分析相结合的方法研究并探索卧式螺旋管内干涸临界热流密度(Dry-out CHF)和极限干度现象(LQR)的规律特性和发生机理。实验发现,较高质量流速条件下螺旋上升段相对于螺旋下降段而言有推迟CHF发生的作用,而这种作用在低质量流速条件下表现不明显;卧式螺旋管内中等质量流速条件下可导致LQR现象。在数据分析基础上,建立了关联临界干度的准则关系式,并定性给出了基于液滴沉降-卷吸理论的干涸CHF作用控制区的划分方法。
关键词:干涸CHF;卧式螺旋管;极限干度;卷吸;沉降
Study on the Characteristics of Dry-out CHF and LQR in a Horizontal Helically-coiled Tube
Chen Changnian1, Kong Lingjian1, Han Jitian1, Dou Pengcheng2
1 School of Energy and Power Engineering, SDU Jinan Shandong Province 250061
2 China Guangdong Nuclear Power Holding Co., Ltd, Shenzhen Guangdong Province 518028
Abstract: An experimental study of Dry-out CHF and LQR in a horizontal helically-coiled tube was performed to investigate the CHF characteristics in order to offer useful data for the performance of heated equipment. The experiment system use R134a as working fluid and the test section was heated uniformly. The experimental parameters were pressures of - MPa, mass fluxes of 40-320 kg m-2 s-1, inlet qualities of --. And the structure parameters of the test section were inner diameter of mm, helix diameter of 300 mm, helix pitch of 40 mm and heated