一个基于流体动力学效应的新型半灵活同轴喷嘴及其自中心性能研究
Yu Li1, Shilei Li1, Xiaobo Du1
1School of Mechanical and Power Engineering, Henan Polytechnic University, Jiaozuo, Henan, China.
Scientific reports
|July 6, 2024
概括
这项研究引入了一种具有动态自中心能力的新型半灵活同轴喷嘴. 创新的设计大大减少了同轴性误差,从而提高了纤维壁厚度的均性,提高了核心外纤维生产质量.
科学领域:
- 材料科学 材料科学 材料科学
- 机械工程 机械工程
- 流体动力学 流体动力学
背景情况:
- 传统的同轴喷嘴在实时同轴性调整方面扎,导致纤维壁厚度不均.
- 纤维生产中的同轴性差导致核心外结构的缺陷和质量降低.
- 现有的设计缺乏动态的自我中心机制,以纠正在操作过程中针头 misalignment.
研究的目的:
- 开发和验证一个具有动态自中心功能的创新的半灵活同轴喷嘴.
- 研究流体动力学和材料特性对喷嘴同轴性的影响.
- 为在纤维生产中实时纠正同轴性误差提供解决方案.
主要方法:
- 建立了基于流体动力学和流体结构相互作用原理的同轴喷嘴的自我中心模型.
- 利用有限元模拟来分析外部流体速度和内针弹性模量对中心化时间和同轴性误差的影响.
- 在线观察同轴挤出工艺并测量壁厚,以验证自中心性能.
主要成果:
- 发现同轴度误差随着模数的增加而增加,随着流速的增加而减少.
- 内针力平衡的集中时间随着模和流体速度的增加而减少.
- 喷嘴在26秒内动态地将初始同轴度误差从380 μm降低到60 μm,控制制造误差在8 μm内.
结论:
- 拟议的具有动态自中心化的半灵活同轴喷嘴有效地解决了实时同轴性挑战.
- 该设计显著提高了纤维壁厚的均性和核心外纤维的整体质量.
- 这项研究为在先进的纤维制造工艺中减轻同轴性误差提供了有价值的解决方案.
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