Measurement of Solid Velocity in the Vertical Pneumatic Transport of Powdery Material at a High Solid-loading Ratio : Fluids Engineering

抄録

In the pneumatic transport of PVC powder whose mean diameter and material density are 134 μm and 1 330 kg/m³, respectively, the solid velocity is measured by the "activable" tracers method, whereby tracers can be activated when required, in a vertical line 100.0 mm in inside diameter and 24 m in length, when the air velocity is changed from 16.5 m/s to 28.9 m/s and the solid-loading ratio between 48.8 and 82.5. The used nuclide was ⁵⁶Mn or ⁸²Br. The pipe friction factor for the solid phase was also obtained for the same conditions. The present method is applicable to measurements at high solid-loading ratios.