AN EXPERIMENTAL STUDY OF PHASE DISTRIBUTION AND TURBULENCE STRUCTURE FOR SOLID/LIQUID FLOW IN A HORIZONTAL PIPE

摘要

Local measurements of the velocity and phase distribution were made for solid/liquid two-phase flows in a horizontal pipe using a multidimensional laser Doppler anemometer (LDA) system. The pipe used had a 30.6 mm inner diameter and was made of a special optically clear material,Fluorinated Ethylene Propylene (FEP), which has the same index of refraction as water. The test section and laser probes were submerged in water so that no optical correctios were necessary. Simultaneous measurements of the liquid and particle phases were obtained and discriminated based on differences in the residence time that each particle had when crossing the LDA's measurement volume.Positive buoyant and negative buoyant solid spherical particles, about 2mm in diameter, were used in this study. A complete data set of the phasic mean velocities, turbulence and volume fractions were taken for each particle type.The results presented herein are complete and self-consistent, and can be used to assess the prediictive capabilities of mulltidimensional two-fluid computational fluid dynamic (CFD) models.