Development of a Concept for a High Capacity Pneumatic Conveying System Employing a Fluid Attachment Device for Use in Underground Excavation

Abstract

A 1 year study of the fluid flow in Coanda eductors was completed. The objective of this study was to develop a mathematical model to predict the performance of such eductors. The model would serve as a tool in the design of Coanda eductors to be used for pneumatic conveying of excavated rock materials. The work completed included both theoretical studies and experimental measurements. The theoretical approaches considered included dimensional analysis, similarity theory, and a vorticity transport method for solving the differential equations of fluid flow in geometries which have axial symmetry, The latter theoretical approach was selected as the most promising and was developed to the point where a computer code was used to predict stream lines, velocities, and developed pressures within the flow field.

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Document Details

Document Type
Technical Report
Publication Date
Feb 28, 1973
Accession Number
AD0759403

Entities

People

  • A. K. Postma
  • D. S. Trent
  • Jonathan D. H. Smith

Organizations

  • Battelle Memorial Institute

Tags

Communities of Interest

  • Air Platforms
  • Energy and Power Technologies
  • Human Systems

DTIC Thesaurus Topics

  • Boundary Layer
  • Computational Fluid Dynamics
  • Computational Science
  • Differential Equations
  • Fluid Dynamics
  • Fluid Flow
  • Fluid Mechanics
  • Heat Transfer
  • Hydrodynamics
  • Mathematical Models
  • Measurement
  • Mechanical Properties
  • Mechanics
  • Physics Laboratories
  • Pressure Distribution
  • Turbulent Mixing
  • Viscous Flow

Readers

  • Combustion and Flow Dynamics.
  • Computational Modeling and Simulation
  • Fluid Dynamics.