Investigation on the Airflow Fields of New Melt-blown Dies with Rectangular Jets

Wang, Yudong; Jiang, Fang; Ning, Wane; Xie, Sheng; Ji, Chengmin

doi:10.1007/s12221-022-0043-4

Cited by 2 publications

(2 citation statements)

References 33 publications

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“…9 diameters are 0.9, 1.26, and 0.7 mm, respectively, which show that smaller nozzle diameters reduce the peak turbulence intensity and help to reduce the velocity fluctuation of the airflow on the centerline. The turbulence generation is proportional to the slope of the mean velocity; the turbulent intensity decreases to a valley where the mean velocity displays its maximum. , Then, the turbulence intensity rises to a local maximum as the slope of the mean velocity rises, and after that, the intensity decays as the collector distance moves further. It is important to note that although the higher velocity along the spinning centerline is more conducive to fiber refinement, the turbulence intensity along the spinning line is not expected to be too large in the experimental process.…”

Section: Resultsmentioning

confidence: 99%

Numerical Analysis of the Airflow Field and Experiments of Fiber Motion for Solution Blowing

Wu,

Wang,

Zhang

et al. 2024

ACS Omega

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Section: Resultsmentioning

confidence: 99%

Numerical Analysis of the Airflow Field and Experiments of Fiber Motion for Solution Blowing

Wu,

Wang,

Zhang

et al. 2024

ACS Omega

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“…However, the airflow field of MB is principally determined by the die configuration. 2,[17][18][19] Extensive research has been dedicated to reducing the fiber diameter by optimizing the die configuration. Die designs can be broadly classified into two categories: the first focuses on improving the die itself, while the second involves incorporating add-on components to the existing die.…”

mentioning

confidence: 99%

Numerical analysis of airflow fields in new modified melt-blowing dies

Zou,

Zhou,

Wang

2023

Textile Research Journal

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Considerable research has been devoted to the optimization of die configuration to effectively reduce both fiber diameter and roping defects. While some progress has been made, the challenge of developing an improvement method for the melt-blowing die that maintains the production efficiency of the original equipment while not damaging it and without introducing unnecessary energy consumption, still persists. Herein, we report a series of new modified dies featuring gradually shrinking air slots along with an internal flow stabilizer or arc nose piece that can be obtained without damaging the original die. The simulation results indicate that the new modified die demonstrated a remarkable enhancement in various aspects. Notably, it resulted in a substantial increase of 40.61% and 11.18 K in average centerline air velocity and average air stagnation temperature, respectively, while simultaneously achieving a remarkable reduction of 49.45% in average centerline turbulence kinetic energy. In addition, our modifications yielded an impressive maximum reduction of 23.08% in fiber diameter. The simulated motion characteristics of the polymer jet demonstrated that the new modified die exhibited superior polymer jet attenuation and lower whipping amplitude. The findings of this study indicate that the new modified die, which incorporates gradually shrinking air slots along with an internal flow stabilizer or arc nose piece, shows promise for the production of melt-blown nonwovens with smaller fiber sizes and a reduced occurrence of roping defects. Future research and development will concentrate on practically implementing this technology in melt-blowing production.

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Investigation on the Airflow Fields of New Melt-blown Dies with Rectangular Jets

Cited by 2 publications

References 33 publications

Numerical Analysis of the Airflow Field and Experiments of Fiber Motion for Solution Blowing

Numerical Analysis of the Airflow Field and Experiments of Fiber Motion for Solution Blowing

Numerical analysis of airflow fields in new modified melt-blowing dies

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