摘要
陶瓷纤维在高技术领域的应用需要对前驱体聚合及纤维纺丝进行深入的研发。实验室规模的纺丝加工孔数少,而中试规模和工业规模生产则要求孔数达到数百甚至上千。由于长丝和惰性气氛间发生强烈相互作用,随着长丝根数增加,纺丝甬道内发生的行为会完全改变。用模型阐述了气体流动及气体受纺丝的影响。在陶瓷纤维的熔融纺丝和干法纺丝这两个例子中,模拟演示了从实验室规模到中试规模固有特征的有效转换。在这两个应用中,按照模拟结果建造纺丝甬道,并按试验结果实施应用。
Ceramic fibers for high-tech applications require intensive developments concerning precursor synthesis and fiber spinning, The spinning process starts at laboratory scale with only few filaments and needs to be upscaled to pilot plant and industrial scale with hundreds or even thousands of filaments. Due to the significant interaction of filaments and surrounding inert atmosphere, the behavior in the spinning tower completely changes with higher numbers of filaments. How these effects are incorporated in a model of the gas flow including its influence by the filament spinning will be described. In 2 examples for melt- and dry-spinning of ceramic fibers it will be demonstrated how characteristic properties derived from experiments on a laboratory scale can be efficiently transferred to a pilot plant scale by use of simulations. For both applications the spinning tower was built according to the conditions derived from the simulation results, and experimentally proven to work.
出处
《国际纺织导报》
2013年第8期15-16,21,22,共4页
Melliand China
关键词
陶瓷纤维
熔融纺丝
干法纺丝
模拟
纺丝甬道
ceramic fiber, melt-spinning, dry-spinning, simulation, spinning tower
