Comparison of the models of different types of snow fences in cold wind tunnel Gurer, Ibrahim et al
Språk: Engelska Språk: Franska Serie: ; topic II-114Utgivningsinformation: XIth international winter road congress 2002, Sapporo [Japan] / XIe congres international de la viabilite hivernal 2002, Sapporo [Japon]. Paper, 2002Beskrivning: 11 sÄmnen: Bibl.nr: VTI 2002.0071Location: Abstrakt: Snow fences are used to reduce the quantity of drifting snow and increase the visibility on the roads. There are many types of snow fences in use through the world. Approximately 1/20 scale models of eleven different types of structural snow fences (Japanese Collector and Blower types, Chinese Vertical and Inclined types, USA Wyoming, Russian, French, Swedish, Norwegian, Canadian and Concrete) were prepared. They were tested under the same laboratory conditions at the cold wind tunnel of the Cryospheric Environmental Simulator (CES) at the Shinjo Branch, Nagaoka Institute of Snow and Ice Studies, National Research Institute of Earth Science and Disaster Prevention, Japan. The catch efficiency, drift volume, dimensionless drift area, rate of collection, shape of the drift both on the leeward and windward sides of each model are compared. The experiment results showed that the normalized catch, expressed as "Mass per unit width of fence /Time"; was highest for Norwegian type model (4.544 g/cm/min), and the lowest for the Russian type model (0.788 g/cm/min). The correlation matrix including all the physical parameters of eleven models tested, showed that the normalized catch of the model is best related to the normalized depth of the model (h/H). The dimensionless drift lengths of all the models extended from 1 to 26 L/H ratio on the leeward side. Models with vertical slats had leeward side drift further down with a more homogeneous distribution of snow in distance.Aktuellt bibliotek | Status | |
---|---|---|
Statens väg- och transportforskningsinstitut | Tillgänglig |
Snow fences are used to reduce the quantity of drifting snow and increase the visibility on the roads. There are many types of snow fences in use through the world. Approximately 1/20 scale models of eleven different types of structural snow fences (Japanese Collector and Blower types, Chinese Vertical and Inclined types, USA Wyoming, Russian, French, Swedish, Norwegian, Canadian and Concrete) were prepared. They were tested under the same laboratory conditions at the cold wind tunnel of the Cryospheric Environmental Simulator (CES) at the Shinjo Branch, Nagaoka Institute of Snow and Ice Studies, National Research Institute of Earth Science and Disaster Prevention, Japan. The catch efficiency, drift volume, dimensionless drift area, rate of collection, shape of the drift both on the leeward and windward sides of each model are compared. The experiment results showed that the normalized catch, expressed as "Mass per unit width of fence /Time"; was highest for Norwegian type model (4.544 g/cm/min), and the lowest for the Russian type model (0.788 g/cm/min). The correlation matrix including all the physical parameters of eleven models tested, showed that the normalized catch of the model is best related to the normalized depth of the model (h/H). The dimensionless drift lengths of all the models extended from 1 to 26 L/H ratio on the leeward side. Models with vertical slats had leeward side drift further down with a more homogeneous distribution of snow in distance.