Numerical Study of Sub-Nozzle Flows for the Weft Transmission in an Air Jet Loom

Kim, Jin Hyeon; Setoguchi, Toshiaki; Kim, Heuy Dong

doi:10.1016/j.proeng.2015.05.107

Cited by 6 publications

(6 citation statements)

References 3 publications

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“…The weft insertion system consists of three parts: main nozzle, relay nozzles, and profiled reeds. As the first part of accelerating the weft yarn, the main nozzle is crucial for enhancing the performance of the air-jet weaving machine [2][3][4][5].…”

Section: Introductionmentioning

confidence: 99%

New Designed Main Nozzle of Air-Jet Weaving Machine for Optimizing Air Consumption using CFD Simulation

Shandilya¹,

Gangopadhyay²

2022

CFDL

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The air-jet weaving machine is widely used in the textile industry and the main nozzle and acceleration tube is one of its key components of the machine. In this paper, the influence of some parameters, including the input air pressure with air inlet length and the structure of the nozzle core and its internal diameter, on the internal flow field of the main nozzle is analyzed to get the velocity of flow at the optimum air pressure that optimizing the air consumption. The flow field inside an air-jet loom main nozzle is studied by simulating the design of the main nozzle and acceleration tube, by means of a two-dimensional model implemented in the Ansys computational fluid dynamics (CFD) code Fluent, by designing the new main nozzle by working on the structural geometry of the main nozzle and acceleration tube. In order to determine the optimum air pressure for the required air velocity with optimum air consumption to flow weft yarn in an air-jet weaving machine.

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Section: Introductionmentioning

confidence: 99%

New Designed Main Nozzle of Air-Jet Weaving Machine for Optimizing Air Consumption using CFD Simulation

Shandilya¹,

Gangopadhyay²

2022

CFDL

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“…The method of stepwise loading successive approximation was used to solve the nonlinear geometric displacement large deformation problem of the space elastic thin rod unit, and the finite element simulation and analysis of the fiber flexible body's movement and deformation during air-jet twisting were carried out and verified by experiment. Kim et al 11 used a computational fluid dynamics method to solve the flow field in a weft passage. The results revealed a strong relationship between air-jet velocity and forces on the weft.…”

mentioning

confidence: 99%

“…Kim et al. 11 used a computational fluid dynamics method to solve the flow field in a weft passage. The results revealed a strong relationship between air-jet velocity and forces on the weft.…”

mentioning

confidence: 99%

Analysis of the characteristics of air–yarn coupling movement in the profiled reed groove of an air-jet loom

Jin

Xiong

Cui

2021

Textile Research Journal

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The movement characteristics of yarn in the profiled reed groove of an air-jet loom can have a great impact on the performance of the fabric. Unstable yarn movement tends to lead to weft defects, as short wefts or weft breaks may occur, which could deteriorate the quality of the final fabric. In this paper, the characteristics of the yarn movement in a profiled reed groove are numerically studied. The arbitrary Lagrangian–Eulerian method is used to solve the two-way airflow–yarn interaction and the yarn is simulated with the ball–socket model. A fluctuation ratio is defined to characterize the unsteadiness of the yarn movement. Our simulation first investigates the effect of the gap ratio of the profiled reed groove (β) on the yarn movement then compares the movements of different yarn kinds. The simulation results indicate that a larger β not only decreases gas leaks (thus saves gas consumption), but also stabilizes the yarn movement. Our simulation results also show that the movement of the yarn of polypropylene is more stable than the other two weft-yarn materials. An experiment is also conducted to validate our numerical results, which shows a favorable agreement between them. Our numerical results of the yarn movement in the profiled reed groove can provide a valuable insight into the optimization of the weft insertion system of the air-jet loom.

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“…Since the first industrial revolution, shuttleless loom technology has become more mature and modern; shuttleless looms 1 with light weight, high output, high quality, low consumption, low vibration, low noise, and fast speed have been successively accepted by the loom market.…”

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confidence: 99%

Effect of initial pressure of oblique-blowing airflow and folding-in airflow on yarn tucked-in in the pneumatic tucked-in selvedge apparatus

Liu

Zhou

Cheng

et al. 2021

Textile Research Journal

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In this paper, numerical simulation and laboratory experiments were combined to research the tucked-in behavior of the yarn in the pneumatic tucked-in selvedge apparatus, and explore the effect of initial pressure of oblique-blowing airflow and folding-in airflow on yarn tucked-in. This work focused on the motion of a single yarn of which one end was fixed while the other was free. Initial pressures for oblique-blowing airflow and folding-in airflow were set as parameters. A numerical model was developed to simulate the process based on the one-way fluid–structure interaction. Then a laboratory experiment was carried out with the help of a high-speed camera to record the motion behaviors of yarns. The motions were compared with the simulation data and showed that the proposed numerical model can properly replicate the motion of yarn and its points in the airflow field. Each group of yarns with different initial pressures was able to be tucked-in and had an elongation. Increasing the initial pressures of oblique-blowing airflow from 0.3 MPa to 0.4 MPa and folding-in airflow from 0.35 MPa to 0.4MPa shortened the time for the yarn to complete the entire oblique-blowing and tucked-in process by 0.4625 ms, and extended the yarn elongation by 0.151 mm.

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Numerical Study of Sub-Nozzle Flows for the Weft Transmission in an Air Jet Loom

Cited by 6 publications

References 3 publications

New Designed Main Nozzle of Air-Jet Weaving Machine for Optimizing Air Consumption using CFD Simulation

New Designed Main Nozzle of Air-Jet Weaving Machine for Optimizing Air Consumption using CFD Simulation

Analysis of the characteristics of air–yarn coupling movement in the profiled reed groove of an air-jet loom

Effect of initial pressure of oblique-blowing airflow and folding-in airflow on yarn tucked-in in the pneumatic tucked-in selvedge apparatus

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