Numerical Study on the Principle of Yarn Formation in Murata Air-Jet Spinning

Autor:	Huifen Guo, Xianglong An, Chongwen Yu
Rok vydání:	2007
Předmět:	Jet (fluid) Engineering Turbulence business.industry Airflow Nozzle Mechanics Vortex Core (optical fiber) General Materials Science Composite material business Spinning Body orifice
Zdroj:	Journal of Textile Engineering. 53:173-178
ISSN:	1880-1986 1346-8235
DOI:	10.4188/jte.53.173
Popis:	A realizable k-e turbulence model was adopted to study the airflow characteristics inside the two nozzles including the slotting-tube of Murata air-jet spinning (MJS). Actions of the two nozzles and the accepted principle of yarn formation were both discussed. The results show that some factors in the first nozzle, such as weak opposite swirling balloon in upstream of the jet orifice, vortex breakdown in downstream of the jet orifice and opposite direction airflows between the grooves and the twisting chamber, do good to produce longer wrapper fibers and form twist difference between the edge fibers and the core ones. The airflow in the second nozzle rotates in the opposite direction to that in the first nozzle, to untwist the swirling balloon that formed by the first nozzle. On the other hand, simulation results well supported the theoretical analysis of the principle of the yarn formation proposed by Stalder and Krause.
Databáze:	OpenAIRE
Externí odkaz:	https://explore.openaire.eu/search/publication?articleId=doi_________::11d2e2516155cce8ccec1f4f2b2fb7d7 https://doi.org/10.4188/jte.53.173 Zobrazit plný text záznamu