大L/d倾斜并联光管汽-液两相流不稳定性实验研究  

Experimental Investigation on Instabilities of Steam-Water Two-Phase Flow in Large L/d Inclined Parallel Upward Smooth Pipes

作　　者：高峰[1] 陈听宽[1] 罗毓珊[1] 尹飞[1] 

机构地区：[1]西安交通大学多相流国家重点实验室,710049

出　　处：《核动力工程》2005年第2期130-134,共5页Nuclear Power Engineering

基　　金：国家自然科学基金资助项目(50323001)

摘　　要：在高压高温试验台上对倾斜并联管汽-液两相流不稳定性进行了实验研究,观察到了压力降型和密度波型等两类不稳定性脉动。在试验管长与管内径比L/d>1200条件下,没有上游可压缩容积时也发生压力降型脉动。系统压力、质量流速、热负荷和进口过冷度等参数对不稳定性有显著的影响。实验表明,在倾斜并联管中,压力降型脉动出现在含气率较低的水动力曲线负斜率段,为两管整体脉动;而密度波型脉动出现在含气率较高的正斜率区域,呈管间脉动。经过对比发现,倾斜并联光管的脉动特性与垂直并联管类似。Experiments on instabilities of steam-water two-phase flow in inclined upward internally bare pipes have been performed on a high-pressure steam-water test loop. Different types of two-phase flow instabilities including pressure drop oscillation (PDO) and density wave oscillation (DWO) were observed. Experiments indicated that PDO happened without upstream compressible volume supplied by a surge tank when the rate of test pipe length and test pipe inner diameter L/d > 1200. The effects of system parameters such as system pressure, mass flow rate, heat flux and inlet sub-cooling are significant on both DWO and PWO. The analytical results showed that PDO happened at a lower exit quality and in the positive portion of the ΔP-G curves with both channel flow rates oscillation in phase, DWO happened at higher exit quality and in the negative portion of the ΔP-G curves with both channel flow rates oscillating out of phase. The investigation results indicated that the oscillation characteristics in inclined parallel upward smooth pipes were similar with in vertical parallel upward pipes.

关 键 词：不稳定性 汽-液两相流 倾斜并联管 压力降型脉动 密度波型脉动 

分 类 号：TK124[动力工程及工程热物理—工程热物理]