竖直管道中弹状流空泡份额测量  

Void Fraction Measurement in Vertical Slug Flow

作　　者：伍享享 黄善仿[1] 白苏 李仲春[2] 李松蔚[2] 周铃岚[2] 江光明[2] 

机构地区：[1]清华大学工程物理系,北京100084 [2]中国核动力研究设计院核反应堆系统设计技术重点实验室,成都610041

出　　处：《核动力工程》2015年第2期165-167,共3页Nuclear Power Engineering

基　　金：中国核动力研究设计院核反应堆系统设计技术重点实验室基金项目(LRSDT20144101A)

摘　　要：采用双头局部电容探针测量空气-水两相流中弹状流的空泡份额和气泡速率。通过理论推导得出该新型探针的工作原理,然后利用该探针测量弹状流中的两相信号。理论分析和实验验证表明,局部电容探针抗干扰性好、输出信号稳定,探针测得的动态信号与弹状流实际运动过程完全一致;所测得弹状流空泡份额α=37.5%,弹状流气泡速率v=0.545 m/s。A double-tip needle-contact capacitance probe is proposed to measure the void fraction as well as the bubble velocity of the slug flow in the vertical air-water two-phase flows. The working principle of this probe is derived by theoretical analyses, and then dynamic experiments are performed to acquire the signals of slug flow. The results show that the new probe works stably and reliably and that the probe is independent of the water salinity. Signals of slug flow detected by the needle-contact capacitance probe are consistent with the actual flow structure. The measured void fraction is α=37.5% and the bubble velocity is v=0.545 m/s.

关 键 词：弹状流 局部电容探针 空泡份额 气泡速率 

分 类 号：TL334[核科学技术—核技术及应用]