刘磊; 孙贺东; 胡志华; 周芳德
LIU Lei; SUN Hedong; HU Zhihua; ZHOU Fangde
摘要: The prediction of slug frequency has important significance on gas-liquid two-phase flow. A
hydrodynamic model was put forward to evaluate slug frequency for horizontal two-phase
flow, based on the dependence of slug frequency on the frequency of unstable interfacial
wave. Using air and water, experimental verification of the model was carried out in a
large range of flow parameters. Six electrical probes were installed at different positions
of a horizontal plexiglass pipe to detect slug frequency development. The pipe is 30 m long
and its inner diameter is 24 mm. It is observed experimentally that the interfacial wave
frequency at the inlet is about 1 to 3 times the frequency of stable slug. The slug
frequencies predicted by the model fit well with Tronconi (1990) model and the experimental
data. The combination of the hydrodynamic model and the experimental data results in a
conclusion that the frequency of equilibrium liquid slug is approximately half the minimum
frequency of interfacial wave.