PRELIMINARY WAVE ANALYSIS OF UNSTEADY SUBWAY VEHICLES AERODYNAMICS

THE REPORT WAS PREPARED UNDER THE INSTITUTE FOR RAPID TRANSIT (IRT) PROJECT, 'VENTILATION AND ENVIRONMENTAL CONTROL IN SUBWAY RAPID TRANSIT SYSTEMS,' AND IS ONE OF MANY SUCH REPORTS LEADING TO A FINAL PRODUCT--A 'SUBWAY ENVIRONMENTAL DESIGN HANDBOOK." TRAINS MOVING IN TUBES EXPERIENCE DRAG FORCES WHICH ARE ORDERS OF MAGNITUDE HIGHER THAN WHEN IN FREE AIR. THE REPORT STUDIES SUCH FORCES AND THEIR DEPENDENT PARAMETERS TO DETERMINE THE TUBE OPTIMAL VENTILATION DESIGN AS WELL AS THE MOVING AND BRAKING POWERS. THE SOLUTIONS OBTAINED IN THIS WORK ARE TO BE CONSIDERED ONLY AS A FIRST APPROXIMATION TO THE UNSTEADY CONFINED VEHICLE PROBLEM. /AUTHOR/

• Supplemental Notes:
  • Contract DOT-UT-29
• Corporate Authors:

  California Institute of Technology

  Graduate Aeronautical Laboratories
  Pasadena, CA  United States 
• Publication Date: 1971-10

Media Info

• Pagination: 56 p.

Subject/Index Terms

• TRT Terms: Aerodynamics; Compressible flow; Environmental engineering; Numerical analysis; Rapid transit cars; Tunnels; Ventilation systems
• Subject Areas: Bridges and other structures; Highways; Safety and Human Factors;

Filing Info

• Accession Number: 00224004
• Record Type: Publication
• Source Agency: National Technical Information Service
• Files: TRIS
• Created Date: Apr 3 1974 12:00AM