薄膜在流延辊上冷却过程温度场的数值模拟研究

为了获得较高表面质量的流延膜片,采用流场仿真手段,对薄膜在流延辊上的冷却过程进行了温度场的数值模拟,并探讨了流延辊直径、螺旋流道导程和流道尺寸对流延膜冷却效率及表面温度均匀性的影响.结果表明,流延膜的冷却效率及表面温度均匀性均随着辊直径的增大先减小再增大;减小流道的宽高比和导程,有助于提高膜片的冷却效率;增大流道的宽高...

Numerical Simulation on Temperature Field of Film Cooling Process on Casting Roller

For the purpose of obtaining the casting film with higher surface quality, the flow field simulation method is used to simulate temperature field of film cooling process on casting roller. And the influence of roller diameter, spiral runner lead and runner size on cooling efficiency and film surface temperature uniformity is discussed. It is found that cooling efficiency and surface temperature uniformity of casting film first decrease and then increase with the increase of roller diameter. And the reduction of runner lead and runner width-to-height ratio improves the cooling efficiency of the film, and reducing runner lead and increasing runner width-to-height ratio improve film surface temperature uniformity. Response surface analysis and structural optimization of three factors (roller diameter, runner lead, and runner size) are carried out with orthogonal experimental design method. The optimized average temperature and temperature range are respectively reduced by 0.082 K and 1.639 K compared with the initial values. The research provides a theoretical basis for improving the surface quality of casting film.