图1 实验系统图

Fig.1 Experimental schematic diagram

图2 旋流器结构参数示意图

Fig.2 Schematic diagram of swirler structural parameters

图3 四种旋流器结构示意图

Fig.3 Schematic diagrams of four types of swirler structures

图4 实验数据处理原理图

Fig.4 Schematic diagram of experimental data processing

图5 原始图像折射畸变机理

Fig.5 Mechanism of refractive distortion in original images

图6 标定块示意图

Fig.6 Schematic diagram of calibration block

图7 标定块表面格栅示意图

Fig.7 Schematic diagram of surface grating on calibration block

图8 畸变前后的格栅分布示意图

Fig.8 Schematic diagram of grating distribution before and after distortion

图9 畸变前后信息多项式拟合结果

Fig.9 Results of polynomial fitting of information before and after distortion

图10 不同直径木棒对拟合结果进行验证示意图

Fig.10 Schematic diagram of verification of fitting results using different diameter wooden rods

图11 不同旋流器产生螺旋环状流液膜厚度概率密度分布[泡状流(jg=0.17 m·s-1，jl =1.2 m·s-1)]

Fig.11 Probability density distribution of spiral annular flow film thickness generated by different swirlers [bubbly flow (jg=0.17 m·s-1, jl =1.2 m·s-1)]

图12 不同旋流器产生螺旋环状流液膜厚度概率密度分布[弹状流(jg=0.35 m·s-1，jl =1.2 m·s-1)]

Fig.12 Probability density distribution of spiral annular flow film thickness generated by different swirlers [slug flow(jg=0.35 m·s-1, jl =1.2 m·s-1)]

图13 不同旋流器产生螺旋环状流液膜厚度概率密度分布[环状流（jg=8 m·s-1，jl =0.8 m·s-1）]

Fig.13 Probability density distribution of spiral annular flow film thickness generated by different swirlers [annular flow(jg=8 m·s-1, jl =0.8 m·s-1)]

图14 平板式旋流器作用下jg=0.1 m·s-1、jl =0.1~0.6 m·s-1下的液膜波动图

Fig.14 Liquid film fluctuation diagrams at different liquid-phase equivalent velocities (jl =0.1—0.6 m·s-1) under the gas-phase equivalent velocity of jg=0.1 m·s-1 with a flat-vane swirler

图15 平板有中心柱式旋流器作用下jg=0.1 m·s-1、jl =0.1~0.6 m·s-1下的液膜波动图

Fig.15 Liquid film fluctuation diagrams at different liquid-phase equivalent velocities (jl =0.1—0.6 m·s-1) under the gas-phase equivalent velocity of jg=0.1 m·s-1 with a flat-vane swirler with hub

图16 平板式旋流器作用下jg=0.1 m·s-1、jl =0.4~0.6 m·s-1下PDF曲线

Fig.16 Probability density distribution diagram of different liquid-phase equivalent velocities (jl =0.4—0.6 m·s-1) under the gas-phase equivalent velocity of jg=0.1 m·s-1 with a flat-vane swirler

图17 平板旋流器作用下jg=0.1 m·s-1、jl =0.4~0.6 m·s-1下PDF曲线

Fig.17 Probability density distribution diagram of different liquid-phase equivalent velocities (jl =0.4—0.6 m·s-1) under the gas-phase equivalent velocity of jg=0.1 m·s-1 with a flat-vane swirler with hub

图18 螺旋叶片式A旋流器作用下jg=0.1 m·s-1、jl =0.1~0.6 m·s-1下的液膜波动图

Fig.18 Liquid film fluctuation diagrams at different liquid-phase equivalent velocities (jl =0.1—0.6 m·s-1) under the gas-phase equivalent velocity of jg=0.1 m·s-1 with a spiral -vane swirler A

图19 螺旋叶片式B旋流器作用下jg=0.1 m·s-1、jl =0.1~0.6 m·s-1下的液膜波动图

Fig.19 Liquid film fluctuation diagrams at different liquid-phase equivalent velocities (jl =0.1—0.6 m·s-1) under the gas-phase equivalent velocity of jg=0.1 m·s-1 with a spiral -vane swirler B

图20 jg=0.1 m·s-1,jl =0.1~0.6 m·s-1工况下不同旋流器作用下的螺旋环状流失稳距离

Fig.20 Stable distance of spiral annular flow under the action of different swirlers under operating conditions of jg=0.1 m·s-1 and jl=0.1—0.6 m·s-1

图21 不同旋流器作用下泡状流流动现象

Fig.21 Flow phenomena of bubbly flow under the action of different swirlers

图22 关于“迎流侧”与“背流侧”的定义

Fig.22 A definition of facing flow side and backward flow side