Particulate Science and Technology, Vol.20, No.4, 283-303, 2002
An experimental technique for the analysis of slug flows in pneumatic pipelines using pressure measurements
An experimental technique has been developed to measure the flow characteristics of slugs inn dense phase pneumatic conveying using pressure measurements. This method is based ova the unique characteristics of slug flows ill pipes, i.e., an axial pressure fluctuation: along the pipeline and a pressure difference ill the radial direction at the back of a slug. Standard differential pressure transducers were used in this start and the influence of the finite response time of these transducers teas considered. Experiments were conducted over a range of gas-solids flow conditions curd experimental data were analyzed to describe the behavior of solids slags through pipes. The calculated slug velocity and length using axial pressure measurements were confirmed by video recordings, and the synthesis between axial and radial pressure signals showed reasonable agreement ill flow pattern analysis. This relatively simple measuring technique has bear found effective in detecting solids shags traveling through horizontal pipes and trill distinguish various flow regimes. It provides a useful and easily applied tool for system optimizing and benchmarking ill industrial applications.
Keywords:low-velocity pneumatic conveying;slug flow analysis;pressure measurement;axial pressure drop;radial pressure difference