Abstract: The low-level wind effect refers to the phenomenon that the airport structure or
other artificial structures located near the runway cause significant disturbance
to the airflow under certain wind conditions. This effect is likely to cause
turbulence or even wind shear, and bring difficulties to the aircrafts' takeoff
and landing. The computational fluid dynamics(CFD) method was adopted to simulate the wind field at Capital
Airport, Beijing, China. To overcome the limitation of CFD in the setting of input wind speed,
high-precision and high-resolution data measured by lidar were introduced into
CFD as input condition to investigate the influence of buildings and
artificial structures on wind speed at Capital Airport. The simulation
results show that when the wind speed of 11~15 m/s under northwest wind
condition was applied, the air flow near east runway was influenced
significantly. The same situation happened in the west runway and
the middle runway under the south wind condition with the same wind speed.

Key words: low-level wind effect, lidar;, computational fluid dynamics nethod, wind field simulation