THE AERODYNAMICS OF VEHICLES PASSING THROUGH TUNNELS

The problem of a vehicle entering and passing through a tunnel is considered. It is shown that the incompressible approximation provides the basic solution and the modifications from this basic solution caused by the compressible wave effects. The effect on the aerodynamics of different propulsion systems is described. The effects of vehicle length, tunnel entrance configurations, and air shafts on vehicle drag and tunnel flow field are considered. The conditions under which the waves generated by the vehicle might escape from the tunnel exit to cause an "exit boom" are determined.

• Supplemental Notes:
  • Presented at the International Symposium on the Aerodynamics and Ventilation of Vehicle Tunnels, sponsored and organized by BHRA Fluid Engineering. Held at University of Kent, Canterbury, England, April 10-12, 1973.
• Corporate Authors:

  BHRA Fluid Engineering

  Bedford,   England 
• Authors:
  • Hammitt, A G
• Conference:
  • Presented at the International Symposium on the Aerodynamics and Ventilation of Vehicle Tunnels, sponsored and organized by BHRA Fluid Engineering. Held at University of Kent, Canterbury, England, April 10-12, 1973.
• Publication Date: 1973

Media Info

• Features: Figures; References;
• Pagination: p. 45-68

Subject/Index Terms

• TRT Terms: Aerodynamics; Drag; Intelligent transportation systems; Tubing; Tunnels
• Old TRIS Terms: Advanced systems; Tube systems; Tunnel drag; Vehicle drag
• Subject Areas: Bridges and other structures; Operations and Traffic Management; Railroads;

Filing Info

• Accession Number: 00054653
• Record Type: Publication
• Report/Paper Numbers: No. C3 Paper
• Files: TRIS
• Created Date: Jun 18 1974 12:00AM