纺织学报 ›› 2008, Vol. 29 ›› Issue (7): 100-103.

• 机械与器材 • 上一篇    下一篇

数值分析喷水孔结构对水针断裂长度的影响

王彩华   

  1. 浙江理工大学材料与纺织学院 浙江杭州310018
  • 收稿日期:2007-07-13 修回日期:2007-10-16 出版日期:2008-07-15 发布日期:2008-07-15

Simulation analysis of the effect of hydroentangling nozzle geometry on the breakup length of water-jets

WANG Caihua   

  1. College of Material and Textile;Zhejiang Sci?-Tech University;Hangzhou;Zhejiang 310018;China
  • Received:2007-07-13 Revised:2007-10-16 Online:2008-07-15 Published:2008-07-15

摘要: 根据水刺加工工艺要求设计了圆锥圆柱型、流线型、圆柱圆锥型3种喷水孔结构。采用大型流体计算软件(CFD)模拟水流流过喷水孔内部的流体流动通道,在大气中形成动力水针过程,并依据数值模拟结果分析喷水孔结构对水针断裂长度的影响。经分析认为圆锥圆柱型喷水孔结构使水针表面易于发散形成水雾,水针断裂长度短;流线型喷水孔结构降低了流体流动通道对水流流动的扰动程度,水针断裂长度有所提高;而圆柱圆锥型喷水孔结构最利于水针保持柱状结构状态,水针断裂长度最长。

Abstract: Three styles of hydroentangling nozzles are designed depending on the requirement in hydroentangling process,that is,cone-capillary nozzle,streamline nozzle and capillary-cone nozzle.A CFD technique is employed to simulate the formation of the water-jets discharged from these nozzles,and the effect of nozzle geometry on water-jet breakup length is analyzed depending on the simulation result.The experiments indicate that the cone-capillary nozzle geometry makes the water jet discharged from the nozzle fogged easily on the water jet surface,and the breakup length of the water jet is shorter;the streamline nozzle geometry makes the disturbance of the nozzle wall to the water flow inside this nozzle decreased,and the breakup length of the water jet is longer;and the capillary-cone nozzle geometry is optimum for water jet to keep collimated and coherent,and the breakup length of the water jet is the longest.

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