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[1]王东祥,凌祥,彭浩.转盘离心粒化熔渣液膜流动特性的数值模拟[J].南京工业大学学报(自然科学版),2015,37(03):67-73.[doi:10.3969/j.issn.1671-7627.2015.03.013]
 WANG Dongxiang,LING Xiang,PENG Hao.Numerical simulation of film flow characteristics of molten slag on spinning disk in centrifugal atomization process[J].Journal of NANJING TECH UNIVERSITY(NATURAL SCIENCE EDITION),2015,37(03):67-73.[doi:10.3969/j.issn.1671-7627.2015.03.013]
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转盘离心粒化熔渣液膜流动特性的数值模拟()
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《南京工业大学学报(自然科学版)》[ISSN:1671-7627/CN:32-1670/N]

卷:
37
期数:
2015年03期
页码:
67-73
栏目:
出版日期:
2015-05-30

文章信息/Info

Title:
Numerical simulation of film flow characteristics of molten slag on spinning disk in centrifugal atomization process
文章编号:
1671-7627(2015)03-0067-07
作者:
王东祥凌祥彭浩
南京工业大学 机械与动力工程学院,江苏 南京 211800
Author(s):
WANG DongxiangLING XiangPENG Hao
College of Mechanical and Power Engineering,Nanjing Tech University,Nanjing 211800,China
关键词:
熔渣 转盘 液膜 VOF
Keywords:
molten slag spinning disk liquid film volume of function(VOF)
分类号:
O351.2
DOI:
10.3969/j.issn.1671-7627.2015.03.013
文献标志码:
A
摘要:
基于流体体积函数法(VOF),建立转盘离心粒化过程中熔渣液膜-空气两相流流动二维数值模型,研究不同粒化操作参数以及熔渣物性条件下液膜厚度以及速度分布,并对转盘边缘液膜厚度进行量纲一的分析。结果表明:转盘表面液膜厚度随熔渣密度的增大而减小,随黏度的提高而增大,而表面张力对于液膜厚度的影响可以忽略。无论水跃现象是否发生,转速对转盘中心区域液膜厚度分布均有显著影响。转盘边缘的液膜厚度与量纲一的埃克曼数(Ek)、韦伯数(We)相关,可采用本文提出的模型进行准确预测。熔渣流量以及物性参数相同时,渣粒的粒度分布与浇注速度或浇注高度无关。
Abstract:
The 2D numerical model for representing the two-phase film flow of molten slag and air in the spinning disk centrifugal atomization process was proposed based on the volume of function(VOF)method.The influence of atomization operating parameters and slag physical properties on film thickness and velocity distribution were numerically investigated,and the film thickness at the edge of disk was analyzed by a dimensionless method.It was revealed that the film thickness decreased with the increasing of density,and ascended with the increasing of viscosity,while the effect of surface tension could be negligible.Whether the hydraulic jump happened or not,the rotary speed showed a remarkable influence on the film thickness distribution in the inner region of disk.The dimensionless analysis indicated that the film thickness at the edge of disk was determined by Ekman number(Ek)and Weber number(We). Thus, it could be predicted accurately by the proposed model.It was concluded that with the same supply flow rate and physical properties,the pouring rate or pouring height had little influence on slag particle size distribution.

参考文献/References:

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备注/Memo

备注/Memo:
收稿日期:2014-03-07
基金项目:国家科技支撑计划(2012BAA07B02); 江苏省普通高校研究生科研创新计划(CXZZ13_0435)
作者简介:王东祥(1985—),男,四川冕宁人,博士生,主要研究方向为工业余热能源回收利用; 凌祥(联系人),教授,E-mail:xling@njtech.edu.cn.
引用本文:王东祥,凌祥,彭浩.转盘离心粒化熔渣液膜流动特性的数值模拟[J].南京工业大学学报:自然科学版,2015,37(3):67-73..
更新日期/Last Update: 2015-05-20