摘要
应用REV尺度的格子Boltzmann方法模拟了树脂沿轻质毡厚度方向的流动过程,考察了加压方式、载荷、温度、双钢带压机结构等对浸渍的影响,为浸渍速度和浸渍时间的预测提供了一种新方法。结果表明:与平板压机相比,双钢带压机通过施加高低交替的压力更能有效地浸渍轻质毡,缩短浸渍时间。另外发现,浸渍不仅与树脂最大浸渍速度有关,还取决于片材在高压区的停留时间。通过增加载荷或升高温度均可提高树脂最大速度,而片材在高压区的停留时间则对压机辊柱直径及载荷更为敏感,仅依靠调节钢带运行速度不能达到缩短浸渍时间的目的。
The lattice Boltzmann method at representative elementary volume （REV） scale was used to simulate transverse impregnation for LWRT （light-weight reinforced thermoplastic）, and it offers a new method for the prediction of impregnation velocity and time. The effects of press manner, loading, temperature and the structure of the double-belt press on impregnation were investigated. The results showed that the double-belt press was more effective in shortening impregnation time compared with the flat press owing to its alternating high/low pressure distribution. Besides, it was found that impregnation was determined by not only the maximum impregnation velocity but also the residence time under high pressure. The maximum impregnation velocity could be improved by enhancing loading and increasing temperature as well. The residence time was more sensitive to the diameter of the roller of double-belt press and loading. However, it was impossible to shorten the impregnation time only by adjusting the processing velocity of the belt.
出处
《化工学报》
EI
CAS
CSCD
北大核心
2011年第12期3545-3553,共9页
CIESC Journal
