Abstract
The dynamic responses of simply supported horizontal pipes conveying gas-liquid two-phase slug flow are explored. The intermittent characteristics of slug flow parameters are mainly considered to analyze the dynamic model of the piping system. The results show that the variations of the midpoint transverse displacement could vary from periodic-like motion to a kind of motion whose amplitude increases as time goes on if increasing the superficial gas velocity. Meanwhile, the dynamic responses have certain relations with the vibration acceleration. By analyzing the parameters in the power spectrum densities of vibration acceleration such as the number of predominant frequencies and the amplitude of each peak frequency, the dynamic behaviors of the piping system like periodicity could be calculated expediently.
Highlights
Fluid-conveying piping systems have been continually adopted in various processes of modern chemical engineering
With the increase of superficial gas velocity, the dynamic responses will vary from periodic-like motion to a kind of motion whose amplitude increases with time
Onefor main peak with tem. small amplitude exists in the case of uSG = 7.0 m/s. It seems that conspicuous discrepthat the analysis of power spectrum densities (PSD) of vibration acceleration could really reflect the dynamic responses ancies existofinthe thepiping vibration shapes for these two cases, which means that the analysis of system
Summary
Fluid-conveying piping systems have been continually adopted in various processes of modern chemical engineering. Dukler and Hubbard [13] and Zhang et al [14] have developed their own models to calculate typical slug flow parameters According to their researches, local slug flow parameters such as the velocities of gas and liquid would always vary with position and time, which would make the vibration of the slug flow piping system more complex. Ebrahimi-Mamaghani et al [20] emphasized the significance of flow parameters for the dynamic behaviors of the vertical piping system conveying two-phase flow. Khudayarov et al [22] explored the relationships between some typical slug parameters such as the length of the gas bubble zone and the dynamic behaviors of the piping system. While few scholars have analyzed the local flow parameters varying with time and position to explore the pipes conveying slug flow.
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