IMPROVEMENT OF BLOWER TYPE SNOW FENCES BY CONTROL OF THE SHEAR LAYER

A blower type snow fence with a new configuration was developed for the prevention of snowdrifts and to improve visibility on roadways. The design was in accordance with hydrodynamic principles, and its performance was evaluated in model wind tunnel experiments in which natural snow was used to simulate blowing snow. Snowdrifts and visibility blockage behind the snow fence were found to be caused by the rolling-up of the gap flow that passes through the bottom part of the fence. This rolling-up of the bottom gap flow could be prevented by controlling the rolling-in of the shear layer separated from the top part of the fence. On the basis of this finding, a perforated plate was placed at the topmost part of the fence in order to weaken the rolling-in of the separated shear layer by diffusing the steep velocity gradient across the layer. (A)

• Availability:
  • Find a library where document is available. Order URL: http://worldcat.org/issn/03884090
• Corporate Authors:

  Kyoto University

  Disaster Prevention Research, Gokasho
  Uji City, Kyoto,   Japan 
• Authors:
  • HANIU, H
  • Sakamoto, H
  • TAKAI, K
• Publication Date: 1995

Language

• English

Media Info

• Features: References;
• Pagination: p. 53-64
• Serial:
  • JOURNAL OF NATURAL DISASTER SCIENCE
  • Volume: 17
  • Issue Number: 1
  • Publisher: Kyoto University
  • ISSN: 0388-4090

Subject/Index Terms

• TRT Terms: Driving; Safety; Snow fences; Winter
• ITRD Terms: 1855: Driving (veh); 1665: Safety; 2561: Snow fence; 2575: Winter
• Subject Areas: Safety and Human Factors;

Filing Info

• Accession Number: 00822515
• Record Type: Publication
• Source Agency: Transport Research Laboratory
• Files: ITRD
• Created Date: Jan 7 2002 12:00AM