AERODYNAMIC INTERFERENCE OF HIGH SPEED GROUND VEHICLES

A general two-dimensional, incompressible, potential flow numerical procedure has been used for the calculation of the unsteady interference loading on either a moving or a stationary high speed train configuration due to the passage of a second identical train. Transient loadings in the presence of crosswinds were of special interest to this study and are included. First estimates of the overall time dependence of the inviscid body forces and moments have been obtained by combining an approximate height integration with the numerical integration of the derived unsteady sectional pressure distributions over the body length. Results for specific body configurations, lateral separations and crosswind conditions are presented. Substantial unsteady aerodynamic interference loads are predicted at the higher approach speeds, especially under crosswind conditions. Critical design loading conditions are encountered when a stationary vehicle is passed by a similar moving vehicle.

  • Corporate Authors:

    American Society of Mechanical Engineers

    Two Park Avenue
    New York, NY  USA  10016-5990
  • Authors:
    • Johnston, G W
    • Seshagiri, B V
    • Ellis, N D
  • Publication Date: 1974-5

Media Info

  • Features: References;

Subject/Index Terms

Filing Info

  • Accession Number: 00057421
  • Record Type: Publication
  • Source Agency: Engineering Index
  • Report/Paper Numbers: N74-FE-22 Paper
  • Files: TRIS
  • Created Date: Nov 6 1976 12:00AM