数值分析喷水孔结构对水针断裂长度的影响  

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

作　　者：王彩华[1] 

机构地区：[1]浙江理工大学材料与纺织学院,浙江杭州310018

出　　处：《纺织学报》2008年第7期100-103,共4页Journal of Textile Research

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。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.

关 键 词：水针板 喷水孔 数值模拟 断裂长度 

分 类 号：TS103[轻工技术与工程—纺织工程]