文献类型：期刊文献

中文题名：气体雾化与喷射成形中雾化过程的数学模型

英文题名：A Mathematical Model of Metallic Melts Break-up Process during Gas Atomization and Spray Forming

作者：李会平[1];何伟[1]

机构：[1]华东理工大学无机材料系,上海200237

年份：2008

卷号：22

期号：3

起止页码：107

中文期刊名：材料导报

外文期刊名：Materials Reports

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

语种：中文

中文关键词：融滴尺寸;破碎;波理论;数学模型;气体雾化;喷射成形;金属

外文关键词：droplet size, break-up, wave theory, mathematical model, gas atomization, spray forming, metal

摘要：应用波理论描述了金属融体气体雾化与喷射成形中初次雾化阶段的破碎过程,导出了最不稳定的波数方程。结合波峰剥离模型,提出了融滴尺寸预测的数学模型,并在计算机上进行了数值模拟。探讨了雾化参数对破碎过程及融滴尺寸的影响,结果表明:在气流速度大于100m/s的情况下,用表面波理论模拟金属融体初次雾化阶段的破碎过程是合理的;从融滴尺寸角度,选用N2气作雾化气体比较合适;表面张力是影响雾化过程的一个重要参数,表面张力越小,雾化越易进行,破碎后的融滴尺寸越小。
The break-up process of metallic melts during gas atomization and spray forming is analyzed using the wave theory and the governing equation for fastest-growing wave number is derived. By combining the Antipas＇ model of wave crest stripping, an integrated mathematical model is proposed to predict the droplet size in primary atomization. The effects of atomizing parameters are simulated on computer. The results show that the surface wave theory is suitable for modeling the primary break-up of metallic melts when the gas velocity is bigger than 100m/s. From the point of view of droplet size, N2 gas is suitable as atomizing gas for the atomization of metallic melts. The surface tension is a key parameter in primary atomization, The droplet size decreases with decreasing surface tension.