光纤探针方法测量界面面积浓度实验研究

采用光纤探针测量方法对垂直上升管中空气 水两相流动的界面面积浓度（IAC）分布规律进行研究。实验选用的管径为50 mm，气相、液相折算速度分别为0.01～1 m/s和0～1 m/s。通过高速摄影获取的影像数据对光纤探针法的测量精度进行评价和标定，获得IAC径向分布。利用IAC数据对几类IAC计算模型进行评价，基于截面含气率变密度模型给出平均IAC与中心截面含气率的关系式。通过与其他实验数据进行比较，表明新关系式具有较高的计算精度。

Experimental Study of Interfacial Area Concentration by Optical Fiber Probe Method

A way of measuring the interfacial area concentration (IAC) of air-water two-phase flow in a vertical pipe with inner diameter of 50 mm by optical fiber probe was researched. The superficial velocities of gas and liquid ranged from 0.01 to 1 m/s and from 0 to 1 m/s, respectively. The accuracy of optical fiber probe method was evaluated and calibrated by comparing with photographic data from high-speed videos. The radial profiles of IAC were given. Several models of calculating IAC were evaluated against experimental results. In the meantime, on the basis of the variable density model of void fraction, a new correlation of the mean IAC related to central void fraction was given. It is verified that the new correlation is of high accuracy by comparing with the other experimental data.