This report describes preliminary theoretical investigations into the nature of air flow and heat flow in an underground rapid transit system. Calculations included in the report demonstrate that the air flow in a subway system may be regarded as incompressible, and based on these findings a mathematical model describing the unsteady air flow generated by a train operating in a single-track subway system has been developed. In addition to these air flow investigations, a mathematical model describing heat flow in a subway tunnel has been created. The theoretical development leading to these two mathematical models is presented and results from the corresponding preliminary computer programs are included. A detailed discussion is provided describing the objectives of the next portion of the investigation, which include expanding these two programs and integrating them with a train performance program and a soil heat-sink model.

  • Supplemental Notes:
    • This report was prepared for the Institute for Rapid Transit, Washington, D.C. and sponsored by the Urban Mass Transportation Administration, U.S. DOT. See also RRIS Nos. 095662 through 095665 and 095667 and 095668, Section 23, RRIS Bulletin 7502.
  • Corporate Authors:

    Parsons Brinckerhoff Quade and Douglas, Incorporated

    One Penn Plaza
    New York, NY  United States  10119
  • Publication Date: 1971-3

Subject/Index Terms

Filing Info

  • Accession Number: 00095666
  • Record Type: Publication
  • Source Agency: Institute for Rapid Transit
  • Report/Paper Numbers: UMTA-DC-MTD-7-71-5 Intrm Rpt.
  • Files: TRIS
  • Created Date: Jul 15 1975 12:00AM