NATURAL VENTILATION ANALYSIS OF FULLY DEPRESSED, PARTIALLY COVERED HIGHWAYS

This work investigates road vehicles pollution distributions in a naturally ventilated fully depressed, partially covered highway. The study is mainly concerned with the effects of the open area and the number of covered sections on pollution distribution. The study recognizes the importance of atmospheric conditions in controlling pollutants concentrations involved in such a design. A steady state induced velocity model coupled with mass balances for the closed and open sections was used to develop a steady state numerical model which calculates the concentration distribution of pollutants throughout the tunnel system. A general computer program which handles any number of closed/open sections with a wide range of assigned lengths and grades is developed. An iteration technique is utilized which balances the mass and momentum transfer by marching back and forth through the tunnel. The model is used to find the effect of the number of closed/open sections on the pollution distribution over a variety of tunnel configurations.

  • Supplemental Notes:
    • AIAA Monograph, V25, Proceedings of the Soc and Aerospace Technology Workshop, Los Angeles, California, 1979.
  • Corporate Authors:

    Western Periodicals Company

    13000 Raymer Street
    North Hollywood, CA  USA  91605
  • Authors:
    • Frost, W
    • Caruthers, J E
    • Abdulrahman, N N
  • Publication Date: 1979-11

Media Info

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Filing Info

  • Accession Number: 00325235
  • Record Type: Publication
  • Source Agency: Engineering Index
  • Files: TRIS
  • Created Date: Apr 15 1981 12:00AM