DOUBLE TRACK POROSITY TESTING

The Subway Environmental Research Project (SERP) was undertaken in order to provide the subway design engineer with a basic understanding of the effects of various design parameters on subway aerodynamics and thermodynamics (and hence on the subway environment). Such understanding permits subway design with an eye toward efficient environmental control. In Phase II of the SERP, a test matrix designed to study the effects of center wall porosity (in a dual-track tunnel) on train drag and far-field air velocity was performed in the DSI SAT-DT facility. Additional testing in the SAT-DT facility was proposed (and conducted) in an attempt to discover the center wall porosity at which system performance nears that of a single tunnel (i.e., solid center wall). The purpose of this report is to describe the results of this additional testing, and to relate these results to those obtained during the original program.

• Corporate Authors:

  Transit Development Corporation, Incorporated

  1730 M Street, NW, Suite 911
  Washington, DC  United States  20036

  Urban Mass Transportation Administration

  Office of Research, Development and Demonstration
  Washington, DC  United States  20590

  Developmental Sciences, Incorporated

  Aerospace Technology Division
  City of Industry, CA  United States 

  Associated Engineers/A Joint Venture

  New York, NY  United States 
• Publication Date: 1975-11

Media Info

• Pagination: 35 p.

Subject/Index Terms

• TRT Terms: Aerodynamics; Air; Design; Design standards; Double track; Drag; Environmental engineering; Environmental quality; Flow; Fluid dynamics; Mechanical resistance; Porosity; Pressure gages; Rail transit facilities; Railroad trains; Structural design; Subways; Test facilities; Tests; Thermodynamics; Tunnels; Walls
• Uncontrolled Terms: Air flow; Design criteria; Fluid flow; Tunnel design
• Old TRIS Terms: Pressure sensors; Subway environment; Train resistance
• Subject Areas: Bridges and other structures; Construction; Design; Environment; Public Transportation; Railroads; Terminals and Facilities; Vehicles and Equipment;

Filing Info

• Accession Number: 00136981
• Record Type: Publication
• Source Agency: National Technical Information Service
• Report/Paper Numbers: UMTA-DC-06-0010-75-4Tech. Rpt.
• Contract Numbers: DOT-UT-290
• Files: NTIS, TRIS, USDOT
• Created Date: Aug 11 2003 12:00AM