Pressure Drop in Horizontal Taper Pipe of Dense-Phase Pneumatic Conveying

Experimental research was performed to describe the pressure drop occurring in horizontal taper pipe of dense phase pneumatic conveying, which were widely used in the engineering project. Compressed air was used as transmission power and fly ash as the transport medium. Results showed that the geometric parameters of taper pipe including taper angle and diameter ratio had a dominant effect on the pressure drop of the gas solid flow. In addition, a three-dimensional numerical simulation was performed to show the trend of the pressure field intuitively in the transporting process. And the simulation results of pressure drop were validated by the experimental data.

Download Full-text

Flow Resistance Characteristics Analysis of Horizontal Shrinked Pipe in Dense Phase Pneumatic Conveying

Advanced Materials Research ◽

10.4028/www.scientific.net/amr.614-615.621 ◽

2012 ◽

Vol 614-615 ◽

pp. 621-625

Author(s):

Qiang Liu ◽

Guang Bin Duan ◽

Zong Ming Liu

Keyword(s):

Pressure Drop ◽

Flow Resistance ◽

Influence Factors ◽

Diameter Ratio ◽

Compressed Air ◽

Pneumatic Conveying ◽

Mass Ratio ◽

Dense Phase ◽

Characteristics Analysis ◽

And Diffusion

In the dense phase pneumatic conveying lab table, used horizontal shrinked pipeline as transmission pipe. Used compressed air as conveying power and dry gypsum powder as transported materials, then conducted with gas-solid conveying experiment. Through the experiment, resulted show change law and influence factors of pressure drop in horizontal shrinked pipeline under different transportation conditions.In this study. The results showed that diameter ratio, solid and gas mass ratio and diffusion angle could affect the pressure drop of the pipeline .

Download Full-text

Dense-phase pneumatic conveying through long pipelines: Effect of significantly compressible air flow on pressure drop

Powder Technology ◽

10.1016/0032-5910(86)80042-0 ◽

1986 ◽

Vol 48 (3) ◽

pp. 193-203 ◽

Cited By ~ 12

Author(s):

K. Konrad

Keyword(s):

Pressure Drop ◽

Air Flow ◽

Pneumatic Conveying ◽

Dense Phase

Download Full-text

A phenomenological model for the pressure drop applicable across both dilute and dense phase pneumatic conveying

Chemical Engineering Science ◽

10.1016/j.ces.2021.116992 ◽

2021 ◽

pp. 116992

Author(s):

O. Orozovic ◽

H. Rajabnia ◽

A. Lavrinec ◽

Y. Alkassar ◽

M.H. Meylan ◽

...

Keyword(s):

Pressure Drop ◽

Phenomenological Model ◽

Pneumatic Conveying ◽

Dense Phase

Download Full-text

The unsteady pressure field of a ducted impeller

Journal of Fluid Mechanics ◽

10.1017/s0022112079002160 ◽

1979 ◽

Vol 90 (2) ◽

pp. 209-226 ◽

Cited By ~ 2

Author(s):

Dac Q. Dang ◽

D. H. Norrie

Keyword(s):

Pressure Field ◽

Three Dimensional ◽

Diameter Ratio ◽

Governing Equations ◽

General Constraint ◽

Unsteady Pressure ◽

Ducted Propeller ◽

Harmonic Components ◽

Phase Angles ◽

Good Agreement

Analyses based on a three-dimensional vortex-filament model are presented for the unsteady pressure field generated by a ducted propeller. An oscillating part is identified in the kernels and absolute terms of the governing equations for the harmonic components, allowing two methods to be developed for the solution of the higher harmonics. The first method is exact and is applicable to ducted propellers with practical configurations (small chord-to-diameter ratio) while the second is approximate but more suitable for ducted systems with large chord-to-diameter ratios. The second method was applied to a configuration for which experimental data were available and good agreement was obtained for pressure harmonic amplitudes downstream of the propeller and for phase angles upstream of the propeller.Special consideration was given to the Kutta-Joukowski condition at the duct trailing edge and a general constraint developed for the doubly coupled governing integral equations.

Download Full-text

Numerical Modeling of Pressure Losses Caused by Bends in Pneumatic Conveying Pipeline

Volume 9: Heat Transfer, Fluid Flows, and Thermal Systems, Parts A, B and C ◽

10.1115/imece2009-11676 ◽

2009 ◽

Author(s):

Jie Cui

Keyword(s):

Numerical Modeling ◽

Pressure Drop ◽

Flow Pattern ◽

Pressure Loss ◽

Pressure Field ◽

Pneumatic Conveying ◽

Laboratory Measurements ◽

Pressure Losses ◽

Flow Information ◽

Parametric Studies

Pneumatic conveying pipelines are widely employed in many industries to transport granular solids. Use of bends with various turning radii in these pipelines is mandatory and it is well known that the bends cause a loss of energy which results in an additional pressure drop. The pressure loss associated with various bends in pneumatic conveying pipelines was studied numerically. The numerical modeling results were validated against laboratory measurements, and parametric studies were performed to examine various factors that affect the pressure loss caused by bends in pneumatic conveying pipelines. Since the numerical results supply flow information at every location in the pipeline, the flow pattern and pressure field of air and pellet were resolved in detail to investigate the mechanism of the pressure loss in such systems.

Download Full-text

CFD Simulation of Gas-Solid Flow in Dense Phase Bypass Pneumatic Conveying Using the Euler-Euler Model

Applied Mechanics and Materials ◽

10.4028/www.scientific.net/amm.26-28.1190 ◽

2010 ◽

Vol 26-28 ◽

pp. 1190-1194 ◽

Cited By ~ 1

Author(s):

Y. Wang ◽

K.C. Williams ◽

M.G. Jones ◽

B. Chen

Keyword(s):

Pressure Drop ◽

Simulation Model ◽

Computational Fluid Dynamic ◽

Cfd Simulation ◽

Fluid Dynamic ◽

Pneumatic Conveying ◽

Dense Phase ◽

Pipe Length ◽

Initial Design ◽

Euler Model

The pressure drop predictions across a bypass pipeline in dense phase pneumatic conveying were investigated numerically. The simulation was conducted using the commercial Computational Fluid Dynamic (CFD) software Fluent with the Euler- Euler model accounting for four-way coupling. Experiments and calculations were conducted using flyash powder conveyed in a horizontal pipeline. The influence of the pipe length on pressure drop prediction was also investigated. The results indicate that pressure prediction of the CFD simulation model for a bypass pipe is promising. The conclusion is that this investigation can offer improved insight and initial design modelling capability for bypass pneumatic conveying systems.

Download Full-text

Flow Analysis in Horizontal Curved Pipe of Dense-Phase Pneumatic Conveying Gypsum Powder

Advanced Materials Research ◽

10.4028/www.scientific.net/amr.422.416 ◽

2011 ◽

Vol 422 ◽

pp. 416-419

Author(s):

Kun Wang ◽

Guang Bin Duan ◽

Zong Ming Liu

Keyword(s):

Flow Analysis ◽

Flow Characteristics ◽

Radius Of Curvature ◽

Pneumatic Conveying ◽

Dense Phase ◽

High Concentration ◽

Bend Radius ◽

Engineering Project ◽

Flow Process ◽

Curved Pipe

Horizontal curved pipe which are widely used in the engineering project and less researched were selected to study in the high concentration of fluidized transportation. Compressed air was used as the transmission power and gypsum powder as the transport medium. And then, the flow characteristics in horizontal curved pipeline of dense phase pneumatic conveying gypsum powder were achieved. The experimental results showed that the geometry parameters such as angle of the bend, radius of curvature and operating parameters i.e. conveying pressure, gas velocity, solid velocity etc have a dominant effect on the gas solid flow process.

Download Full-text