NON-UNIFORM FLOWS IN RAILWAY TUNNELS

Two possible contributory causes of the lack of agreement between predicted and measured pressure histories in railway tunnels are investigated. It is shown that non-uniformity of velocity distributions at a cross-section can greatly influence the steady component of air flows alongside trains. The unsteady component is less sensitive to the velocity distribution, but it may be strongly influenced by the dependence of skin friction on accelerations.

• Supplemental Notes:
  • Also pub. as ISSN-0309-7293.
• Corporate Authors:

  University of Cambridge

  Department of Engineering, Trumpington Street
  Cambridge,   United Kingdom  CB2 1PZ
• Authors:
  • VARDY, A E
• Publication Date: 1979

Media Info

• Pagination: 55 p.

Subject/Index Terms

• TRT Terms: Aerodynamic force; Air; Drag; Flow; Flow fields; High speed rail; Instruments for measuring loads or pressure; Measurement; Pressure; Pressure waves; Railroad tunnels; Skin friction; Tunnels; Unsteady flow; Velocity measurement; Wave motion
• Uncontrolled Terms: Air flow
• Old TRIS Terms: Pressure measurement
• Subject Areas: Bridges and other structures; Railroads;

Filing Info

• Accession Number: 00336368
• Record Type: Publication
• Source Agency: National Technical Information Service
• Report/Paper Numbers: CUED/A-AERO/TR.7-1979
• Files: TRIS
• Created Date: May 21 1981 12:00AM