A novel semi-flexible coaxial nozzle based on fluid dynamics effects and its self-centering performance study.

Yu Li, Shilei Li, Xiaobo Du, Haijun Qu, Jianping Wang, Pingyan Bian, Haiguang Zhang, Shuisheng Chen

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Article in Scientific reports, 2024. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Not yet cited in PubMed.

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8 authors.

Yu LiSchool of Mechanical and Power Engineering, Henan Polytechnic University, Jiaozuo, Henan, China.

Shilei LiSchool of Mechanical and Power Engineering, Henan Polytechnic University, Jiaozuo, Henan, China.

Xiaobo DuSchool of Mechanical and Power Engineering, Henan Polytechnic University, Jiaozuo, Henan, China.

Haijun QuSchool of Mechanical and Power Engineering, Henan Polytechnic University, Jiaozuo, Henan, China.

Jianping WangSchool of Mechanical and Power Engineering, Henan Polytechnic University, Jiaozuo, Henan, China.

Pingyan BianSchool of Mechanical and Power Engineering, Henan Polytechnic University, Jiaozuo, Henan, China. bianpy@hpu.edu.cn.

Haiguang ZhangNational Demonstration Center for Experimental Engineering Training Education, Shanghai University, Shanghai, China. haiguang_zhang@i.shu.edu.cn.

Shuisheng ChenSchool of Mechanical and Power Engineering, Henan Polytechnic University, Jiaozuo, Henan, China.

Funding

Doctoral Fund Project of Henan Polytechnic University B2017-29Fundamental Research Funds for the Universities of Henan Province NSFRF210341Key Scientific Research Projects of Higher Education Institutions of Henan Province 24A460013National Natural Science Foundation of China 52275498Natural Science Foundation of Henan Province 222300420447Young Teachers' Backbone Training Program of Henan Polytechnic University 2022XQG-07

6 · The paper itself

Abstract

Coaxial nozzles are widely used to produce fibers with core-shell structures. However, conventional coaxial nozzles cannot adjust the coaxiality of the inner and outer needles in real-time during the fiber production process, resulting in uneven fiber wall thickness and poor quality. Therefore, we proposed an innovative semi-flexible coaxial nozzle with a dynamic self-centering function. This new design addresses the challenge of ensuring the coaxiality of the inner and outer needles of the coaxial nozzle. First, based on the principles of fluid dynamics and fluid-structure interaction, a self-centering model for a coaxial nozzle is established. Second, the influence of external fluid velocity and inner needle elastic modulus on the centering time and coaxiality error is analyzed by finite element simulation. Finally, the self-centering performance of the coaxial nozzle is verified by observing the coaxial extrusion process online and measuring the wall thickness of the formed hollow fiber. The results showed that the coaxiality error increased with the increase of Young's modulus E and decreased with the increase of flow velocity. The centering time required for the inner needle to achieve force balance decreases with the increase of Young's modulus (

Indexed as

CoaxialityCoaxial nozzleFluid–solid couplingSelf-centeringSemi-flexible

Identifiers

PMID38971868

DOI10.1038/s41598-024-66623-8

PMCPMC11227544

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Read under generation 80e0d062 · epoch 390. Bibliography from PubMed, PubMed Central and OpenAlex; grants from NIH RePORTER; trial links from ClinicalTrials.gov; estimates, votes and beliefs from the OpenQuestion graph.