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Analysis of a Freight Pipeline System

  • T. S. Lundgren
  • Y. Zhao
Conference paper
  • 165 Downloads
Part of the Fluid Mechanics and its Applications book series (FMIA, volume 43)

Abstract

This paper examines the aerodynamic characteristics of a freight pipeline system in which freight capsules are individually propelled by electrical motors. The fundamental difference between this system and the more extensively studied pneumatic pipeline is the different role played by aerodynamic forces. In a driven system the propelled capsules are resisted by aerodynamic forces and, in reaction, pump air through the tube. In contrast, in a pneumatic system external blowers pump air through the tubes and this provides thrust for the capsules. An incompressible transient analysis is developed to study the aerodynamics of multiple capsules in a cross linked two-bore pipeline. An aerodynamic friction coefficient is used as a cost parameter to compare the effects of capsule blockage and headway and to assess the merits of adits and vents. We conclude that optimum efficiency for off-design operation is obtained with long platoons of capsules in vented or adit connected tubes.

Keywords

Aerodynamic Force Cost Parameter Headway Time Pipeline System Freight Transport 
These keywords were added by machine and not by the authors. This process is experimental and the keywords may be updated as the learning algorithm improves.

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References

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Copyright information

© Springer Science+Business Media Dordrecht 1998

Authors and Affiliations

  • T. S. Lundgren
    • 1
  • Y. Zhao
    • 1
  1. 1.Dept. Aerospace Engineering and MechanicsUniversity of MinnesotaMinneapolisUSA

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