Accession Number:

AD0759403

Title:

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

Descriptive Note:

Final rept. 10 Feb 1972-10 Feb 1973

Corporate Author:

BATTELLE MEMORIAL INST RICHLAND WA PACIFIC NORTHWEST LABS

Report Date:

1973-02-28

Pagination or Media Count:

107.0

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.

Subject Categories:

  • Fluidics and Fluerics
  • Civil Engineering

Distribution Statement:

APPROVED FOR PUBLIC RELEASE