横向风 meaning in Chinese

beam wind
u weeleg
upsweep leg

Analysis of flow characteristics around train - bridge system under cross wind and train induced wind
横向风与列车风联合作用下车桥系统绕流分析
The results show that the higher the wind velocity is , the faster the concentration of the pollutants will attenuate after the pollutants leave the tunnel portal ; while the transversal wind will result in the higher concentration of pollutants in a large range around the tunnel portal
计算结果表明，风速越高，废气离开峒口后，浓度衰减得越快；而横向风则会导致隧道两侧很大区域内的污染物浓度超标。