GENERALIZED EQUATION OF PRESSURE LOSSES IN DISPERSED POWDER FLOW THROUGH VERTICAL PIPES

Abstract

The results of the experimental investigation of pressure losses in a vertical co-current flow of a two phase solid particles-air system are given for the transient character of flow of the continuous phase. The dispersed phase was formed by 6 fractions of polypropylene particles and 5 fractions of glass ballotini of 90 · 10⁻⁶−370 · 10⁻⁶ m and 60 · 10⁻⁶−200 · 10⁻⁶ m equivalent diameter, respectively. The relative mass fraction of solid particles varied over the interval 0-1 dilute. On the basis of experimental data the generalized equation for the computation of pressure losses for the vertical transport was derived. The pressure losses calculated on the basis of this equation were compared with data published by 9 authors.

KEYWORDS:

• Pressure losses
• Two phase co-current flow
• Vertical pipes
• Gas-particles system
• Generalized equation
• Dilute suspensions