薄膜生产线热风系统的数值模拟

he stability and uniformity of wind field created by the Hot Air System have a significant influence on the film production. Numerical simulation method was used in this article to study the air flow in the existing Hot Air System, the velocity and static pressure distribution of the flow field in the system with a fan which speed was 1600rpm at normal temperature and pressure were obtained and analyzed. The results showed that, the movement of airflow in the air box was with relatively strong turbulence, and the swirl was appeared at the end of the air box, the velocity distribution in the middle-air-cushion was not uniform，the biggest deviation of the speed in the air-cushion was 5.8m/s, the static pressure distribution in the middle-air-cushion was not uniform too, the pressure increased with increasing distance from the inlet, the biggest deviation of the static pressure in the air-cushion was 37Pa,the inclined holes and the gaps between air boxes have impacts on the velocity and static pressure distribution in the air-cushion.