Numerical Modelling of Air Flow in Air Jet Weaving System

The control of air flow fields generated in the textile manufacturing process is important to fiber motion. With the expansion of textile applications and the challenges brought by carbon emissions, a series of fundamental research has been conducted on the control of various forms of air flow fields in textile processes. This paper reviews the research on air flow fields and fiber motion in textile processes over the past few decades, focusing on both experimental and numerical studies. The air flow field characteristics, fiber motion patterns, and corresponding control methods for vortex, jet and shear flow fields in the textile process are summarized. The results show that the air flow field and fiber motion are major factors affecting textile structure. These fundamental studies are of great significance in improving product quality, reducing energy consumption, and exploring novel applications.

Section: Jet Fieldsmentioning

confidence: 99%

Progress of air flow field and fiber motion analysis in textile manufacturing process: a review

Dong,

Zhang,

Yue

et al. 2024

“…Supply air flows from duct (5) to chamber (6); the polar array of holes (8), manufactured on one of the needle shoulders, acts as a local pneumatic resistance, so that air pressure in the chamber (6) can be considered constant. As a consequence, the supply flow is redistributed inside the annular passage (7), thus generating an axis-symmetric flow.…”

Section: Air-jet Loom Main Nozzlementioning

confidence: 99%

“…A numerical approach to analyze main air-jet loom nozzle flow field was proposed by some authors. Adamek reported, for example, results on a main nozzle two-dimensional numerical model, addressed to the analysis of the mixing zone shape [8]. Kim and Song numerically analyzed the influence of air tank pressure, accelerating…”

mentioning

confidence: 99%

Numerical Model of an Air-jet Loom Main Nozzle for Drag Forces Evaluation

Belforte

Mattiazzo

Viktorov

et al. 2009

The flow field inside an air-jet loom main nozzle is studied numerically, by means of a two-dimensional model implemented in the commercial computational fluid dynamics (CFD) code Fluent. In order to determine which physical model could allow a better prediction of the nozzle behavior, preliminary simulations were carried out on a basic geometry configuration, changing flow models and comparing results with available experimental data. Having done the model setup, simulations aimed at evaluating drag force on the weft yarn were performed on various geometry configurations; in particular, the influence of acceleration tube length, shape and size on drag force was evaluated. Results gave some guidelines for future prototyping and experimentation.

“…8 Therefore, research works have mainly focused on the improvement of air-jet weaving efficiency through the following two routes: (1) optimizing the operational parameters of nozzles and the air-supply system; [9][10][11] (2) optimizing the geometric parameters of the main nozzle and the sub-nozzle. 12,13 In fact, the air drag of the yarn is caused by the viscous effect between the air flow and yarn surface when the yarn moves in the air flow. 14 Our previous research indicated that the change in both chemical and physical surface properties of PET yarn via DBD plasma treatment could affect its air drag.…”

mentioning

confidence: 99%

The effect of dielectric barrier discharge plasma treatment on the air drag force of polyacrylonitrile, polyethylene, polypropylene and polyethylene terephthalate yarns

Liu

et al. 2018

In this paper, atmospheric pressure dielectric barrier discharge (DBD) plasma was used to treat four kinds of chemical fiber yarns, namely polyacrylonitrile (PAN), polyethylene (PE), polypropylene (PP) and polyethylene terephthalate (PET), for which the air drag force, moisture regain and yarn diameter were measured. Compared with untreated samples, the air drags of treated PAN, PE, PP and PET yarns increased maximally by 10.7%, 43.0%, 40.0% and 18.9%, respectively, in the present experiments. A two-way analysis of variance and correlation analysis were performed to study the effect of plasma treatment on air drag and other properties of these four chemical fiber yarns. The combination of X-ray photoelectron spectroscopy analysis and the determination of the DBD plasma component can further enhance the understanding of the difference between DBD plasma treatment processes among these four chemical fiber yarns. This study provided the experimental basis to improve the air-jet weaving efficiency of chemical fiber fabrics.