文献类型：期刊文献

中文题名：基于Fluent的超高压撞击流乳化喷嘴的优化分析

英文题名：Optimized Analysis for Impinging Streams Emulsification Nozzle under Hyper High Pressure on Software Fluent

作者：李光霁[1];潘家祯[1]

机构：[1]华东理工大学机械与动力工程学院,上海200237

年份：2008

卷号：29

期号：4

起止页码：634

中文期刊名：力学季刊

外文期刊名：Chinese Quarterly of Mechanics

收录：CSTPCD;;北大核心:【北大核心2004】；CSCD:【CSCD2011_2012】；

语种：中文

中文关键词：超高压;撞击速度;模拟;微观混合;压力波动

外文关键词：hyper high pressure;impinging velocity; simulation; micromixing; pressure wave

摘要：高压液体通过喷嘴加速,形成高速射流,与相反方向的另一股射流相互撞击,发生强烈的相互作用,产生强烈的径向和轴向湍流速度分量以及狭窄的高压高速湍流区,在此区域内,相间或液滴间的碰撞互磨产生的挤压力和剪切力使流体被细化。本文从液体连续相撞击流的两个特征:微观混合和压力波动入手,逐一分析了撞击速度与微观混合、压力波动的关系,得出了压力波动与撞击流速度u0成正比关系,微观混合与u30成正比的规律。同时,用流体模拟软件Fluent对喷嘴的结构和尺寸进行优化,并得出最合理的喷嘴结构和尺寸。模拟认为:在相同压力下,采用矩形槽,出口孔径为0.2mm,槽的深度为0.27mm的结构时撞击速度达到最大,并通过实验验证了这一结论。
High pressure liquid, which is accelerated through a nozzle, impinges on another jet in the opposite direction, leading to strong interaction. The radial and axial velocity of intense turbulent flows and a strait region of high pressure and velocity turbulent flow occur due to the impinging. In this strait re- gion, the liquid drops refinement are achieved by extrusive and shearing force between different phases and drops. The relation among impinging velocity, micromixing and pressure wave was analyzed through two characteristics of liquid-continuous impinging streams, micromixing and pressure wave. It shows that the pressure wave is proportional to impinging velocity u0 and micromixing is in proportion to u^3 0. Simultaneously, the most reasonable structure and size of nozzle were gained by the optimization of the nozzle structure and dimension with FEA software Fluent. It is concluded that the structure, rectangle slot, outlet diameter of 0.2mm, slot depth of 0.27mm, produces the maximal impinge velocity. The conclusion is verified by the experiment.