摘要
利用ANSYS软件对受口模入口处周期性振动的压力驱动的非牛顿幂律聚合物熔体在“L”形异型材挤出口模内的前沿推进过程进行了三维等温数值模拟。求得不同时刻熔体前沿位置 ,从而得到熔体前沿推进过程。通过改变振动参数而重复计算 ,总结出振动参数对前沿推进的影响规律。结果表明 :在入口压力的振幅恒定时 ,其振频越高 ,则熔体前沿移动越快 ;在振频恒定时 ,随着振幅的提高 ,熔体前沿的推进则先变慢后变快。
Three dimensional isothermal numerical simulation is conducted by means of ANSYS software package for the front advancement of non Newtonian power law polymer melt flow driven by a periodically oscillating entrance pressure through an extrusion die with a “L' shaped cross section. The proceeding of the melt front is shown by various positions at different time. The numerical simulation is implemented under various sets of oscillation parameters. Thereafter, effects of oscillation parameters on the advancement of melt front is outlined as that when the amplitude of the entrance pressure keeps constant, the advancement of the melt front becomes faster with the increase of the frequency but when the frequency of the entrance pressure keeps constant, the advancement of the melt front at first becomes slower and then goes faster with the increase of the amplitude.
出处
《中国塑料》
CAS
CSCD
北大核心
2003年第12期62-65,共4页
China Plastics
基金
国家自然科学基金
江西省自然科学基金资助项目
