• ISSN 0258-2724
  • CN 51-1277/U
  • EI Compendex
  • Scopus
  • Indexed by Core Journals of China, Chinese S&T Journal Citation Reports
  • Chinese S&T Journal Citation Reports
  • Chinese Science Citation Database
Volume 13 Issue 2
Apr.  2000
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Article Contents
LIGang, YANGMin, HUANG Ru-qin. Experimental Study on the Wall Jet in Defined Spaceduring Tunnel Construction[J]. Journal of Southwest Jiaotong University, 2000, 13(2): 137-140.
Citation: LIGang, YANGMin, HUANG Ru-qin. Experimental Study on the Wall Jet in Defined Space during Tunnel Construction[J]. Journal of Southwest Jiaotong University, 2000, 13(2): 137-140.

Experimental Study on the Wall Jet in Defined Space during Tunnel Construction

  • Publish Date: 25 Apr 2000
  • The purpose of this paper is to studythewall jet in defined space duringtunnel construction. For two-dimensional wall jets in defined space, through a lot of experiments and theoretical analyses it is con- cluded that: (1) the flowfield ofwall jet in defined space can be categorized as thewall jet zone, the back flow zone and the eddy zone; (2) the boundaryof awall jet can be approximately regarded as a straight line and the angle of spread is 7.67 degrees; (3) the flowmotions in the developing region and fully developed region of the flow are similar; and (4) along the distance, the maximumvelocity of profile decays faster in defined space than that in half-limitless space; and the length of the back flowzone in a defined space wall jet increases with the increase of the pipe flow. In this paper, the formula for calculating the length of the back flow zone is presented.

     

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