What is it about?
In the textile industry, air-jet nozzles known as Jetring, Nozzlering, Compact-jet and Siro-jet are used for the final spinning of the yarn. The air flow, which determines the yarn quality and other yarn properties, depends on the flow parameters such as pressure, mass flow rate, and the structural parameters of the air jet nozzle which acting on the flow parameters. In this study, SST turbulence model was selected and 225 kPa (absolute) total pressure was applied to the nozzle injectors. Approximately 2,500,000 tetrahedral elements are used for any geometry in the mesh prepared for parametric study. All parameters solved in ANSYS CFX 18.0 with used parametric study. The structural parameters were subjected to parametric CFD analysis and different flow parameters such as mass flow, swirling number, geometric swirling number, Reynolds number, vorticity, helicity real eigen, velocity, velocity w (z-axis velocity, i.e. twisting chamber axis), total pressure, flow pressure were compared.
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Why is it important?
This is the first article in the literature on a parametric CFD study on jetring nozzles.
Perspectives
To understand the significant properties of yarn quality such as values of swirling number (Sn) and geometric swirling number (Sg) or values such as vorticity and helicity real eigen and to determine an optimum nozzle shape, should be supported by experimental studies that affect yarn quality
Ekrem Gulsevincler
Kastamonu Universitesi
Read the Original
This page is a summary of: The effects of structural parameters on tangentially injected highly swirling turbulent tube air flow, SN Applied Sciences, July 2019, Springer Science + Business Media,
DOI: 10.1007/s42452-019-0850-4.
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