VEHICLE-TUNNEL ENTRY AT SUBSONIC SPEEDS

Experimental results on vehicle-tunnel interactions during the entering period of the vehicle include measurements of pressure on the tunnel and on the vehicle itself. The measurements were made for various Mach number conditions, vehicle-head shapes, tunnel positions, and for various positions on the surface of the vehicle. These results are of direct interest and use in the design of a vehicle. The direct implication of the pressure state during entry is that for Mach numbers presently contemplated (equivalent to 300+ mph) all ports must be sealed as the train enters the tunnel. The differential pressure level and the rates of change of pressure to be sealed against can be found from the information given in the report.

• Supplemental Notes:
  • See also Part I, PB-190 912.
• Corporate Authors:

  Massachusetts Institute of Technology

  Engineering Projects Laboratory
  Cambridge, MA  United States 
• Authors:
  • Swarden, M C
• Publication Date: 1973-1

Media Info

• Pagination: 67 p.

Subject/Index Terms

• TRT Terms: Cylindrical bodies; Differentials (Gears); Fluid dynamics; Human factors engineering; Oscillographs; Passenger cars; Passenger vehicles; Simulation; Speed of sound; Tubing; Vehicular tunnels
• Uncontrolled Terms: Fluorocarbons; Interaction; Model tests
• Old TRIS Terms: Differential pressure; Ohsgt; Subsonic characteristics; Tunnel entry; Vehicle tunnel entry
• Subject Areas: Railroads; Safety and Human Factors;

Filing Info

• Accession Number: 00046222
• Record Type: Publication
• Source Agency: National Technical Information Service
• Report/Paper Numbers: DSR-76111-4 Final Rpt
• Contract Numbers: DOT-C-85-65
• Files: NTIS, TRIS
• Created Date: Jul 31 1973 12:00AM