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 m0.2 m0.3 m0.4 m0.5 m

1.5 m/s0.2490.4970.7460.9941.243
2 m/s0.1860.3730.5590.7460.932
3 m/s0.1240.2490.3730.4970.621
4 m/s0.0930.1860.2800.3730.466
5 m/s0.0750.1490.2240.2980.373
6 m/s0.0620.1240.1860.2490.311
7 m/s0.0530.1070.1600.2130.266
8 m/s0.0470.0930.1400.1860.233
9 m/s0.0410.0830.1240.1660.207
10 m/s0.0370.0750.1120.1490.186
11 m/s0.0340.0680.1020.1360.169
12 m/s0.0310.0620.0930.1240.155