机构地区: 福州大学材料科学与工程学院
出 处: 《计算机与应用化学》 2013年第4期431-434,共4页
摘 要: 由于气雾化回流场的高温及复杂环境,缺乏合适的测量仪器能够用于与熔滴冷却有关物理量的测量,对雾化机理的规律长期处于不明之中。大部分文献对雾化机理的探讨,多停留在定性阶段。为了完全弄清雾化规律,准确定量预测粒径分布和组织特征。本文采用CFD数值分析的方法,在FLUENT6-3.26上采用离散相模型首次针对压力对熔滴冷却速率及冷却时间的影响进行定量的分析,发现随着压力的增加,冷却速率升高,冷却时间迅速减小。同时给出相应的函数关系式,其中,冷却时间t=0.0222P P为雾化压力;冷却速率v=57.543P冷却速率v=1.28f发现采用幂函数来表达雾化压力与冷却时间,冷却速率三者之间的关系能得到吻合度非常好的结果。 Due to the high temperature and complex environment of atomization flow field and the lack of appropriate instruments for the measurement physical parameters of the droplet about cooling rate and cooling time .The atomization mechanism is unknown in the long period. The most of the literature relate to the mechanism of atomization remain in the qualitative stage. As a fully understand the atomization law, we attempt to establish accurate prediction particle diameter and Organization characteristics. This paper is related to quantitative analysis on the effect of pressure on the droplet cooling rate and cooling time using the method of numerical analysis for the first time and is given the corresponding function relation. Cooling time t=-0.0222P5142, P as the atomization pressure; cooling rate v=57.543P-5194; cooling rate v=1.28t-t The result shows that using the power function express the relationship of among atomization pressure ,cooling time and cooling rate can get very good results.
分 类 号: [TB383]
领 域: [一般工业技术]