Abstract
Recently, the long-distance mud transport pipeline systems using a compressed air are utilizing in the field of marine construction works and coastal zone developments. This system is very useful for high density mud transport. However, previous studies of air-liquid two-phase flow have mainly focused on the flow deformation phenomena in short-distance pipeline. The purpose of this study was to clarify the mechanism of mud transporting pipeline system using a compressed air in the experimentally. This papers describe about moving velocity, pressure gradient, pressure fluctuations and passage period of slug flow in long pipeline. As the result of experiment, itwas to clarify that the rate of increase on slug velocity is remarkable at the end of pipeline and it was shown that the passage period of slug flow in long pipeline was controlled by quantity of liquid.
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