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会议：第十二届亚洲纺织会议暨2013中国纺织学术年会

时间：2013年10月24-26日

地点：上海东华大学

分会场：现代纺织装备技术

报告题目：中国纺织机械行业人才培养体系建设

报告人：陈革

报告英文简介：

Vortex spinning has been regarded as one of unconventional spinning technologies with promising features and novelty. In this technology, yarns are produced at extremely high speed by utilizing high-speed swirling airflow generated inside the nozzle by means of tangential injection. As a result, the nozzle is the key part in vortex spinning whose interior flow structure is of vital importance to the spinning process and yarn quality. In this paper, the unsteady structure of the swirling flow in concentric tubes with different lengths induced by means of tangential inlets as a model for the vortex spinning nozzle is preliminarily studied and analyzed using numerical simulation. The results show that high-speed swirling flow is formed inside the entire outer tube after the compressed air enters it through the tangential inlets. The swirling flow whirls intensively in the region between the tangential inlets and the inner tube inlet. The swirling flow is non-axisymmetric to the center of the tube. Then the swirling flow moves into the annular region between the two tubes and whirls regularly. Periodic formation of vortex pair can be seen between the tangential inlets and the outer tube inlet. A recirculation zone is also formed inside the inner tube.

【专题】第十二届亚洲纺织会议暨2013中国纺织学术年会

http://www.ctei.gov.cn/special/2013nzt/atc12/