Towards simulation of force and velocity fluctuations due to turbulence in the relay nozzle jet of an air jet loom

Delcour, Lucas; Langenhove, Lieva Van; Degroote, Joris

doi:10.1177/0040517520968285

Cited by 6 publications

(3 citation statements)

References 34 publications

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“…Although unsteady RANS can capture forces such as vortex shedding, turbulent eddies with a length scale in the relay nozzle jet are ignored and the weft is not subjected to these eddies. In order to capture eddies at more scales, Delcour et al 54 developed the LES model for simulating highly under-expanded jets in weft insertion. The LES clearly illustrated the oscillatory behavior of the flow when the yarn presence was not considered.…”

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

Textile Research Journal

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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.

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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

Textile Research Journal

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“…Researchers have carried out a large number of numerical and experimental studies on flow field characteristics, injection performance and energy consumption of auxiliary nozzles [3] [5] [13], including the influence of structural parameters of auxiliary nozzles, nozzle shape, nozzle number and flow parameters on flow field characteristics. Relevant scholars have studied the nozzle shape of single-hole nozzle [4], the diameter of single-round hole [1] and its taper value [2], the optimal aspect ratio of rectangular nozzle [12], and the cross-sectional area of nozzle outlet [11].…”

Section: Introductionmentioning

confidence: 99%

Prediction of Maximum Outlet Velocity of Auxiliary Nozzle with Six Orifices Based on PSO-BP

He¹,

Yin²,

Chen³

et al. 2022

Proceedings of the International Conference on Information Economy, Data Modeling and Cloud Computing, ICIDC 2022, 17-19 June 2

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In view of the complexity of the auxiliary nozzle structure of air-jet looms, a prediction model between the auxiliary nozzle structure parameters and the maximum exit velocity was established based on PSO-BP. Firstly, the finite element model of the auxiliary nozzle was established by using Ansys software. Secondly, 500 sets of structural parameters were sampled using Latin hypercube sampling, and the corresponding maximum outlet velocity was obtained using the finite element model. Finally, 450 groups of samples are used as the training set, and the remaining 50 groups are used as the test set to establish the PSO-BP prediction model. The results show that the PSO-BP model is effective and accurate to predict the maximum exit velocity of the auxiliary nozzle.

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“…6,10,13 – 16 Several authors have dealt with the theoretical investigation of the simulation of a yarn launched by the main nozzle of an air-jet weaving loom. 17–19 Another parameter is the unevenness of the yarn diameter, which added another factor that complicates the determination of air drag force on the yarn.…”

mentioning

confidence: 99%

Numerical study of flows for slub yarn transmission in an air jet

Messiry

Mohamed

2022

Textile Research Journal

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This paper focused on the investigation of the slub yarn parameters and the relationships of the aerodynamic friction along the surface of the slub yarn. The calculation of the frictional drag force was analyzed for spun yarns, which proves it has an irregular surface due to the irregularity of the yarn diameter along its length. In the case of slub yarns, the main descriptive parameters such as slub length, slub distance, slub multiplier, and base yarn count, will affect the air drag coefficient. A methodology for the calculation of the coefficient of air drag along the yarn in an airstream was developed for both regular and slub yarns under different conditions. The air frictional drag coefficients of yarn samples were calculated accordingly. Finally, empirical equations were developed. Calculations of the air friction drag coefficient of slub yarn were determined. The experimental results agreed well with the model predictions and showed that the present model had a high prediction accuracy.

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Towards simulation of force and velocity fluctuations due to turbulence in the relay nozzle jet of an air jet loom

Cited by 6 publications

References 34 publications

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

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

Prediction of Maximum Outlet Velocity of Auxiliary Nozzle with Six Orifices Based on PSO-BP

Numerical study of flows for slub yarn transmission in an air jet

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