ANALYSIS OF THE EFFECTS OF WALL PERFORATIONS ON THE PERFORMANCE OF A VEHICLE IN A TUBE

The flow induced by a vehicle traveling through a porous-wall tube is analyzed as a one-dimensional incompressible flow steady in the vehicle-fixed frame of reference. The pressure and velocity fields are determined for both non-viscous and visocus flows, for varying vehicle blockage ratios, for externally and internally propelled vehicles, and for various tube-wall porosities. Drag decreases with increasing wall porosity, up to a critical value, which is 10% for a vehicle blockage of 40% and a vehicle length of five times the tube radius.

• Authors:
  • Cromack, D E
• Publication Date: 1969-9

Media Info

• Pagination: p. 335-51
• Serial:
  • High Speed Ground Transportation Journal
  • Volume: 3
  • Issue Number: 3

Subject/Index Terms

• TRT Terms: Pneumatic conveyors; Porosity; Research; Vehicle dynamics
• Old TRIS Terms: Tube vehicles
• Subject Areas: Railroads; Research;

Filing Info

• Accession Number: 00037186
• Record Type: Publication
• Source Agency: Engineering Index
• Files: TRIS
• Created Date: Oct 20 1973 12:00AM