Research Article
Study on Tunnel Air Curtain Insulation System for Cold Areas
Table 3
The relationship between jet thickness and wind velocity outside the tunnel, barrier efficiency.
| External wind speed | Barrier efficiency of different jet thickness | 0.1 m | 0.2 m | 0.3 m | 0.4 m | 0.5 m |
| 1.5 m/s | 0.249 | 0.497 | 0.746 | 0.994 | 1.243 | 2 m/s | 0.186 | 0.373 | 0.559 | 0.746 | 0.932 | 3 m/s | 0.124 | 0.249 | 0.373 | 0.497 | 0.621 | 4 m/s | 0.093 | 0.186 | 0.280 | 0.373 | 0.466 | 5 m/s | 0.075 | 0.149 | 0.224 | 0.298 | 0.373 | 6 m/s | 0.062 | 0.124 | 0.186 | 0.249 | 0.311 | 7 m/s | 0.053 | 0.107 | 0.160 | 0.213 | 0.266 | 8 m/s | 0.047 | 0.093 | 0.140 | 0.186 | 0.233 | 9 m/s | 0.041 | 0.083 | 0.124 | 0.166 | 0.207 | 10 m/s | 0.037 | 0.075 | 0.112 | 0.149 | 0.186 | 11 m/s | 0.034 | 0.068 | 0.102 | 0.136 | 0.169 | 12 m/s | 0.031 | 0.062 | 0.093 | 0.124 | 0.155 |
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