倾斜内螺纹管中亚临界及超临界压力汽-液传热特性研究  

An Investigation on Heat Transfer Characteristics of Sub-Critical and Supercritical Pressure Steam-Liquid in an Inclined Internally Ribbed Tube

作　　者：尹飞[1] 李会雄[1] 陈听宽[1] 罗毓珊[1] 王为术[1] 朱晓静[1] 

机构地区：[1]西安交通大学动力工程多相流国家重点实验室,710049

出　　处：《核动力工程》2005年第1期15-18,共4页Nuclear Power Engineering

基　　金：国家自然科学基金重大资助项目(No.50323001)

摘　　要：在p=9～28MPa,G=600～1200kg/(m2ˇs),q=200～600kW/m2的工况范围内,研究了φ38.1×7.5mm倾斜上升内螺纹管(水平倾角α=19.5°)中亚临界以及超临界汽-液的传热特性。试验结果表明在亚临界压力区,内螺纹管有效地抑制了膜态沸腾的发生,但近临界压力区内螺纹管传热强化作用减弱;超临界压力区内螺纹管的传热良好;工程设计时要保证足够的管内最小质量流速;文中还给出了临界质量流速的试验关联式。Within the range of pressures from 9 to 28MPa, mass velocity from 600 to 1200kg/(m2·s), and internal heat flux from 200 to 600kW/ m2, experiments have been performed to investigate the heat transfer characteristics of sub-critical and supercritical steam-liquid in an inclined upward internally ribbed tube with the inclined angle of 19.5 degree from the horizon, the outer diameter of 38.1mm, and the thickness of 7.5mm. Based on results, it was found that heat transfer enhancement of the internally ribbed tube can restrain the de- parture from nucleate boiling at sub-critical pressure. Near the critical pressure, heat transfer enhancement of the internally ribbed tube decreased. At supercritical pressure, the temperature differences between the wall and the fluid were small. Enough mass velocity needs to be supplied in the practical design. Correlation of critical mass velocity has been provided.

关 键 词：倾斜管 内螺纹管 亚临界压力 超临界压力 汽—液传热特性 

分 类 号：TK124[动力工程及工程热物理—工程热物理]