FLEXIBILITY IN MOTION

The various types of tunnel ventilation systems, longitudinal, transverse, and semi-transverse are discussed as well as axial fans with controllable pitch in motion which are touted to be better than other types of fans because they handle fluctuating loads, reverse airflow safely, quickly and precisely in emergency situations and are provided an extra measure of safety by using anti-stall rings which prevent stalling regardless of flow and pressure conditions.

• Availability:
  • Find a library where document is available. Order URL: http://worldcat.org/issn/0041414X
• Corporate Authors:

  Morgan-Grampian (Construction Press) Limited

  Morgan-Grampian House, 30 Calderwood Street
  London SE18 6QH,   England 
• Authors:
  • Johansson, I
• Publication Date: 1990-4

Media Info

• Features: Figures; References; Tables;
• Pagination: p. 63-65
• Serial:
  • Tunnels & Tunnelling International
  • Volume: 22
  • Issue Number: 4
  • Publisher: Progressive Media Markets, Ltd
  • ISSN: 0041-414X

Subject/Index Terms

• TRT Terms: Controllable pitch propellers; Fans; Flexibility; Safety; Tunnels; Ventilation systems
• Uncontrolled Terms: Longitudinal movement; Transverse movement
• Old TRIS Terms: Axial flow
• Subject Areas: Bridges and other structures; Geotechnology; Highways; Public Transportation; Safety and Human Factors;

Filing Info

• Accession Number: 00494405
• Record Type: Publication
• Files: TRIS
• Created Date: May 31 1990 12:00AM