Experimental Study on the Fiber Motion in the Nozzle of Vortex Spinning via High-Speed Photography

Pei, Zeguang; Chen, Ge; Zhou, Qing; Yu, Chongwen; Yang, Jianping; Wang, Yongxing; You-min, Zhuang; Mao, Limin

doi:10.1080/15440478.2012.683660

Cited by 16 publications

(12 citation statements)

References 8 publications

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“…Although ring spinning is pre-dominantly used, other techniques of yarn manufacturing such as airjet spinning have emerged owing to simplification of process, high production rate and lower cost. Vortex spun yarn, a variant of air-jet spun yarn (Oxenham, 2001), has gained acceptance in the spun yarn market since the last decade owing to its similarities to conventional ring spun yarn, in terms of appearance and tenacity values (Guldemet Basal & Oxenham, 2003;Nazan Erdumlu, Ozipek, & Oxenham, 2012b). Vortex spun yarn is composed of an untwisted core of parallel fibres wrapped around by sheath fibres in a helical fashion (Soe, Takahashi, Nakajima, Matsuo, & Matsumoto, 2004).…”

Section: Introductionmentioning

confidence: 99%

Effect of key process variables on mechanical properties of blended vortex spun yarns

Bhatti

Tausif

Mir

et al. 2018

The Journal of The Textile Institute

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Section: Introductionmentioning

confidence: 99%

Effect of key process variables on mechanical properties of blended vortex spun yarns

Bhatti

Tausif

Mir

et al. 2018

The Journal of The Textile Institute

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“…To understand the effect of the airflow on the fibers and yarns, some researchers have conducted experimental studies. Zeng and Yu, 11 Guo and Xu, 12 and Pei et al 13 adopted high-speed photography to capture and analyze the fiber motion in the airflow field at different operating conditions of air-jet spinning. Seyedi et al 14 utilized the tracer fiber technique to investigate and analyze the fiber migration in the airflow field of newly rotor-jet spun yarn with the rotor-jet spinning parameters varying.…”

mentioning

confidence: 99%

“…Zeng and Yu, 11 Guo and Xu, 12 and Pei et al. 13 adopted high-speed photography to capture and analyze the fiber motion in the airflow field at different operating conditions of air-jet spinning. Seyedi et al.…”

mentioning

confidence: 99%

Characterization of the airflow field in the rotor spinning unit based on a novel experimental approach and numerical simulation

Shi

Akankwasa

Zhang

et al. 2020

Textile Research Journal

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It is very challenging to experimentally characterize and verify the airflow in the rotor spinning machine because the process takes place in an enclosure. In an attempt to portray the process, we present a methodology that combines a novel experimental approach and numerical techniques. We developed a model unit and used colored smoke to mimic the airflow behavior practically, measured the air pressure, and compared the results to the simulation data. Three state conditions, namely suction and rotation (the regular rotor spinning operation, (Case 1)), without rotation (Case 2), and without suction (Case 3), were adopted to investigate the formation mechanism of the airflow field in the rotor spinning unit based on two operating conditions. Results show that, in a regular state, the airstream accelerates rapidly in the transfer channel under the dominant action of air suction at the rotor outlet and crashes clockwise to the rotor wall with the joint action of two operating conditions. In the rotor, the airflow flows clockwise with the velocity distribution of a multi-ring gradient due to the dominant action of high-speed rotor rotation. Analytics from the air pressure indicate that while the air pressure in the rotor is mainly controlled by the action of the air suction mechanism, it is also affected by the superposition action of the rotation mechanism. This approach is groundbreaking for rotor spinning machine optimization and is anticipated to trigger more insights that will lead to fundamental research in the spinning industry and beyond.

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“…Yarn properties are closely related to the airflow patterns and fiber dynamics in the nozzle. Although the fiber dynamics during the vortex spinning process have been studied by some researchers, 9,[11][12][13] studies on the flow pattern in the nozzle still need to deepened and refined in order to better understand the physics behind it and provide a reference for the design of the nozzle, both theoretically and experimentally. In our previous studies, 14,15 the twisting system of vortex spinning was abstracted into a model of concentric tubes of different lengths with tangential injectors, in which a longer outer tube with tangential injectors represents the nozzle while a shorter inner tube represents the hollow spindle.…”

mentioning

confidence: 99%

Effects of structural parameters on the tangentially injected swirling flow in concentric tubes with different lengths as a model of the vortex spinning nozzle

Sun

Pei

2015

Textile Research Journal

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The tangentially injected swirling tube flow has broad applications in various engineering fields. In the textile industry, the vortex spinning technology, which produces short-staple yarns by means of a tangentially injected swirling airflow, is of great prospect in view of its spinning speed and yarn structure. In this paper, the vortex spinning nozzle is abstracted into a model of concentric tubes of different lengths with tangential injectors. A computational fluid dynamics model is presented to study the effects of some structural parameters on the swirling flow generated in this tube system. The particle image velocimetry (PIV) technique is adopted to measure the flow field. Due to the difficulty in duplicating the Mach number, Reynolds numbers are matched between the tube model and prototype in the PIV experiment. Despite the discrepancy between the velocity values provided by the numerical simulation and experiment due to the compressibility effects not being reproduced in the PIV measurement, a comparative analysis concludes that qualitatively matched results on the flow pattern and effects of the structural parameters are obtained by the numerical simulation and PIV measurement.

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Experimental Study on the Fiber Motion in the Nozzle of Vortex Spinning via High-Speed Photography

Cited by 16 publications

References 8 publications

Effect of key process variables on mechanical properties of blended vortex spun yarns

Effect of key process variables on mechanical properties of blended vortex spun yarns

Characterization of the airflow field in the rotor spinning unit based on a novel experimental approach and numerical simulation

Effects of structural parameters on the tangentially injected swirling flow in concentric tubes with different lengths as a model of the vortex spinning nozzle

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