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https://nap.nationalacademies.org/catalog/27432/critical-issues-in-transportation-for-2024-and-beyond

RESISTANCES OF THE AIR IN THE RUNNING OF TRAINS IN TUNNELS

The study of the additional resistance to the movement of trains in tunnels goes back to the end of the last century when investigations had been started on the ventilation rendered necessary on account of the pollution caused by the combustion of carbon in steam traction. Subsequently there have been other investigations and experimental researches which, however, have been discontinued with the diffusion of electric traction. In the technical literature in the last few years memoranda and articles have reappeared in which information is given on new theoretical and experimental findings on the resistance offered by the air to the progress of traction units rolling stock of modern form and shape whether in open track or in tunnel in relation also to high speeds. In the present treatment which comes within the scope of these findings, not being able to appeal to actual experiments however it is proposed with the help of traditional calculation systems, to bring the problem forward again, endeavouring to demonstrate the interdependence of some geometrical and physical parameters characterizing a tunnel and a railway train with the additional resistances to progress in underground structures. The phenomenon is quantified in a sufficiently large number of cases from which to draw conclusions of a general nature useful either for the operating or for the planning of high speed lines.

  • Corporate Authors:

    International Railway Congress Association

    17-21 rue de Louvrain
    1000 Brussels,   Belgium 
  • Authors:
    • Pellis, P
  • Publication Date: 1980-4

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Filing Info

  • Accession Number: 00319992
  • Record Type: Publication
  • Source Agency: British Railways
  • Files: TRIS
  • Created Date: Nov 29 1980 12:00AM