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

Belforte, Guido; Mattiazzo, Giuliana; Viktorov, Vladimir; Visconte, Carmen

doi:10.1177/0040517508096223

Cited by 16 publications

(17 citation statements)

References 8 publications

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“…A qualitative comparison of the results with experiments was performed based on high speed footage and reasonable agreement was found. Belforte et al 11 used a 2-dimensional computational fluid dynamics (CFD) simulation to calculate the drag force on a nylon yarn in a main nozzle and compared different turbulence models. De Meulemeester, Githaiga et al 12 established a 1-dimensional model to analyse the tension in the yarn during yarn braking.…”

Section: Several Models and Simulation Methodologies Aimed At Modellimentioning

confidence: 99%

Three-dimensional fluid-structure interaction simulations of a yarn subjected to the main nozzle flow of an air-jet weaving loom using a Chimera technique

Delcour

Peeters

Degroote

2019

Textile Research Journal

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In air-jet weaving looms, the main nozzle pulls the yarn from the prewinder by means of a high velocity air flow. The flexible yarn is excited by the flow and exhibits high amplitude oscillations. The motion of the yarn is important for the reliability and the attainable speed of the insertion. Fluid-structure interaction simulations calculate the interaction between the air flow and the yarn motion and could provide additional insight into yarn behavior. However, the use of an arbitrary Lagrangian–Eulerian approach for the deforming fluid domain around a flexible yarn typically results in severe mesh degradation, vastly reducing the accuracy of the calculations or limiting the physical time that can be simulated. In this research, the feasibility of using a Chimera technique to simulate the motion of a yarn interacting with the air flow from a main nozzle was investigated. This methodology combines a fixed background grid with a moving component grid deforming along with the yarn. The component grid is, however, not constrained by the boundaries of the flow domain allowing for large deformations with limited mesh degradation. Two separate cases were investigated. In the first case, the yarn was considered to be clamped at the main nozzle inlet. For the second case, the yarn was allowed to move axially as the main nozzle pulled it from a drum storage system.

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Section: Several Models and Simulation Methodologies Aimed At Modellimentioning

confidence: 99%

Three-dimensional fluid-structure interaction simulations of a yarn subjected to the main nozzle flow of an air-jet weaving loom using a Chimera technique

Delcour

Peeters

Degroote

2019

Textile Research Journal

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“…Plate X shows the three-dimensional air flow in the reed channel. Belforte et al (2009) studied the flow field inside an air-jet loom main nozzle by applying a two-dimensional CFD model. They designed different models and compared the simulation results with experimental data in order to find the best-fit model.…”

Section: Fabric Productionmentioning

confidence: 99%

Computational fluid dynamics (CFD) and its application to textile technology

Jungbecker

Veit

2012

Simulation in Textile Technology

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“…Among the first to apply CFD to air jet looms were Oh et al 7 They performed simulations of the air flow inside several main nozzle geometries in order to obtain some basic design guidelines. Other examples of CFD investigations of the main nozzle are the works of Kim et al, 8 Belforte et al, 9 Jin et al 10 and He et al 11 Not only the main nozzle but also the relay nozzles have been the subject of CFD investigations, albeit to a lesser extent. By means of CFD, Kim et al 12 studied the flow field in the reed channel for several relay nozzle diameters, supply pressures and orientations.…”

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confidence: 99%

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

Delcour

Langenhove

Degroote

2020

Textile Research Journal

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This research was aimed at obtaining a first estimation of the effect of turbulent vortices present in the relay nozzle jets of an air jet loom on the weft. To this end a large eddy simulation (LES) model was set up and validated capable of simulating a highly underexpanded jet up to a point sufficiently far from the nozzle exit such that flow features at the weft location could be analyzed. The quality of the LES was evaluated based on several quality criteria as well as by comparing the results with experiments and data from the literature. The results show that for a free jet substantial velocity fluctuations are present at a representative yarn location. By inserting a rigid cylinder at this location, the corresponding force fluctuations on a smooth yarn were also obtained. The research shows that the unsteadiness in the jet is quite substantial, as are the corresponding force fluctuations. These fluctuations could have a profound impact on the yarn motion and should at least be considered when using numerical tools to evaluate the forces on or the motion of a yarn acted on by a relay nozzle jet.

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

Cited by 16 publications

References 8 publications

Three-dimensional fluid-structure interaction simulations of a yarn subjected to the main nozzle flow of an air-jet weaving loom using a Chimera technique

Three-dimensional fluid-structure interaction simulations of a yarn subjected to the main nozzle flow of an air-jet weaving loom using a Chimera technique

Computational fluid dynamics (CFD) and its application to textile technology

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

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