TY - JOUR

T1 - Quantitative analysis of transverse non-uniformity of liquid film at the initial stage of annular-dispersed flow

AU - Isaenkov, S.

AU - Cherdantsev, A.

AU - Cherdantsev, M.

AU - Markovich, D.

PY - 2017/10/22

Y1 - 2017/10/22

N2 - The process of formation of disturbance waves in annular gas-liquid flow was studied using three-dimensional configuration of brightness-based laser-induced fluorescence technique in two ducts of different geometry in the proximity of the inlet. The process was found to consist of three stages: formation of initial two-dimensional high-frequency waves; fragmentation into localised chaotic 3D-waves and formation of large-scale quasi-2D disturbance waves. A method of quantitative characterisation of the degree of transverse coherence of film surface was developed and used to estimate the coordinates of the borders of the three stages. All the stages occur closer to the inlet at higher superficial gas velocities and lower liquid flow rates. It was found that the shape of the duct does not exert significant influence of the distance of existence of two-dimensional initial waves, whilst the disturbance waves are formed closer to the inlet in the circular duct.

AB - The process of formation of disturbance waves in annular gas-liquid flow was studied using three-dimensional configuration of brightness-based laser-induced fluorescence technique in two ducts of different geometry in the proximity of the inlet. The process was found to consist of three stages: formation of initial two-dimensional high-frequency waves; fragmentation into localised chaotic 3D-waves and formation of large-scale quasi-2D disturbance waves. A method of quantitative characterisation of the degree of transverse coherence of film surface was developed and used to estimate the coordinates of the borders of the three stages. All the stages occur closer to the inlet at higher superficial gas velocities and lower liquid flow rates. It was found that the shape of the duct does not exert significant influence of the distance of existence of two-dimensional initial waves, whilst the disturbance waves are formed closer to the inlet in the circular duct.

KW - DISTURBANCE WAVES

KW - 2-PHASE FLOW

UR - http://www.scopus.com/inward/record.url?scp=85033222938&partnerID=8YFLogxK

U2 - 10.1088/1742-6596/894/1/012105

DO - 10.1088/1742-6596/894/1/012105

M3 - Article

AN - SCOPUS:85033222938

VL - 894

JO - Journal of Physics: Conference Series

JF - Journal of Physics: Conference Series

SN - 1742-6588

IS - 1

M1 - 012105

ER -