该【双基推进剂螺压挤出成型工艺流变特性的数值模拟研究 】是由【niuwk】上传分享，文档一共【2】页，该文档可以免费在线阅读，需要了解更多关于【双基推进剂螺压挤出成型工艺流变特性的数值模拟研究 】的内容，可以使用淘豆网的站内搜索功能，选择自己适合的文档，以下文字是截取该文章内的部分文字，如需要获得完整电子版，请下载此文档到您的设备，方便您编辑和打印。双基推进剂螺压挤出成型工艺流变特性的数值模拟研究 摘要： 本文采用数值模拟方法研究了双基推进剂在螺压挤出成型过程中的流变特性。通过建立相应的数值模型，对推进剂在不同加工工艺条件下的流动行为进行模拟分析，探究了其对挤出成型过程的影响及其机理。结果表明，双基推进剂在高温高压条件下呈现出典型的塑性流变特性，其中粘度随着剪切速率的增加呈现出逐渐下降的趋势，并存在剪切变稀现象。另外，挤出成型工艺条件对推进剂的流变特性也有明显的影响，不同的加工参数可以导致推进剂的流变特性发生明显改变。本文的研究结果对于推进剂的加工制造以及相关工艺的优化具有一定的指导意义。 关键词：双基推进剂；螺压挤出成型；流变特性；数值模拟；剪切变稀 Abstract： This paper studies the rheological properties of double-base propellant in the process of screw extrusion molding by numerical simulation method. By establishing corresponding numerical models, the flow behavior of propellant under different processing conditions is simulated and analyzed, and its impact on extrusion molding process and its mechanism are explored. The results show that under high temperature and high pressure conditions, double-base propellant presents typical plastic rheological properties, in which the viscosity gradually decreases with the increase of shear rate, and there exists a shear-thinning phenomenon. In addition, the processing conditions of extrusion molding also have a significant impact on the rheological properties of propellant, and different processing parameters can lead to significant changes in the rheological properties of propellant. The research results of this paper have certain guiding significance for the processing and manufacturing of propellant and the optimization of related processes. Keywords: double-base propellant; screw extrusion molding; rheological properties; numerical simulation; shear-thinning
