Numerical simulation of flow field in the pneumatic compact spinning systems using Finite Element Method
International Journal of Clothing Science and Technology
ISSN: 0955-6222
Article publication date: 21 June 2018
Issue publication date: 24 July 2018
Abstract
Purpose
Pneumatic compact spinning is the most widely used compact spinning method at present, in which the negative pressure airflow is used to condense the fiber in order to decrease the spinning triangle and improve the yarn qualities. Therefore, the research on flow field in the condensing zone is always the emphasis for pneumatic compact spinning. The paper aims to discuss these issues.
Design/methodology/approach
By using finite element method (FEM), the flow field in two kinds of pneumatic compact spinning was studied. Taking three kinds of cotton yarns as examples, with the help of high-speed camera system OLYMPUS i-SPEED3, the motion trajectory of fiber strand in the condensing zone was obtained. Three-dimensional physical models of the condensing zone of the two compact spinning systems were obtained according to the measured parameters of practical spinning systems.
Findings
It is shown that on the both left edge of B1 line and right edge of B2 line, the airflow inflows to the center line of suction slot, and the condensed effects are produced, correspondingly. In the condensing zone, there are three condensing processes acting on the fiber strand, including the rapid condensing effects in the front condensing zone, the adequately condensing effects in the middle condensing zone, and stable output effects in the back condensing zone.
Originality/value
By using FEM, numerical simulations of three-dimensional flow field in condensing zone for two kinds of pneumatic compact spinning with lattice apron were presented, and corresponding spun yarn qualities were analyzed.
Keywords
Acknowledgements
This work was supported by the Natural Science Foundation of Jiangsu Province(BK20170169), Henan Collaborative Innovation of Textile and Clothing Industry (hnfz14002), National Engineering Laboratory for Advanced Textile Processing and Clean Production (GCSYS201701), State Key Laboratory for Hubei New Textile Materials and Advanced Processing Technology (ZDSYS201701), A Project of the Xinjiang Uygur Autonomous Region Key Research and Development (2017B02011), A Project Funded by the Priority Academic Program Development of Jiangsu Higher Education Institutions (PAPD), the Industrial Support Project of Suqian City (H201612, H201607), and Fundamental Research Funds for the Central Universities (JUSRP51731B).
Citation
Su, X., Liu, X. and Liu, X. (2018), "Numerical simulation of flow field in the pneumatic compact spinning systems using Finite Element Method", International Journal of Clothing Science and Technology, Vol. 30 No. 3, pp. 363-379. https://doi.org/10.1108/IJCST-11-2017-0180
Publisher
:Emerald Publishing Limited
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