低质量流速下不同尺寸垂直并联内螺纹管压力降不稳定试验研究  

Research on Pressure-Drop Type Instabilities Between Different Parallel Vertical Rifled Tubes at Lower Mass Velocity

作　　者：邓志安[1] 罗毓姗[1] 王海军[1] 陈听宽[1] 吴渊[2] 

机构地区：[1]西安交通大学多相流国家重点实验室,西安710049 [2]西安石油大学石油工程学院,西安710065

出　　处：《核动力工程》2011年第2期68-71,85,共5页Nuclear Power Engineering

基　　金：国家自然科学基金资助项目(10975111)

摘　　要：在高压汽水试验回路上进行低质量流速下两相流压力降不稳定对比试验研究,分析进口压力、质量流速、进口过冷度对两种垂直并联内螺纹管两相流不稳定的影响。结果表明,两种内螺纹管发生压力降型脉动的界限干度范围和脉动周期范围接近;随进口压力、质量流速的增加,发生压力降型脉动的临界热负荷增加;随着进口压力的增加,发生压力降型脉动的界限干度增加。在相同工况下,6头内螺纹管的稳定性要好于4头内螺纹管。对6头内螺纹管,随质量流速增加,发生压力降脉动的界限干度增加;但对4头内螺纹管,随质量流速增加,发生压力降脉动的界限干度先增加后降低。An experimental study was carried out on the pressure-drop type instabilities of the two-phase flow of the parallel vertical rifled tube in the high-pressure vapor-water test loop.The comparision of the effects of two types of tubes on the two-phase flow instabilities have been conducted.The results show that with the increase of inlet pressure and mass flow rate,the boundary heat flux of pressure-drop type oscillations increases;the boundary dryness thresholds of pressure-drop type oscillations increase with the increase of inlet pressure.In addition,with the increase of mass flow rat,the boundary dryness thresholds of pressure-drop type oscillations are increased with rifled tube of Φ31.8 mm×6 mm,but first increased and then decreased for the rifled tube of Φ28.6 mm×5.8 mm.It is also found that the range of the boundary dryness thresholds and the periods of the oscillations of pressure-drop type oscillations for two types of tubes are similar.Under the same operation parameters,the rifled tube of Φ31.8 mm×6 mm is more stable.

关 键 词：两相流 压力降脉动 垂直并联内螺纹管 低质量流速 超临界 

分 类 号：TK124[动力工程及工程热物理—工程热物理]