本文利用大涡模拟模型分析薄板坯连铸钢液非稳态湍流特性,其中非稳态湍流流动N-S方程采用盒式函数进行滤波处理,亚格子模型采用Smagorinsky-Lilly模型.将大涡模拟结果与粒子图像测速及超声探伤结果进行分析比较来校正模型.通过对薄板坯连铸过程进行数值分析,获得了结晶器内非稳态钢液湍流的流动特征,包括流场的漩涡分布及大涡拟序结构的形成、发展、脱落和破碎过程,并发现即使水口和结晶器在几何上完全对中,结晶器内湍流分布也不对称,偏流产生是必然的,同时导致弯月面较强的波动.随着非稳态时间的延长,结晶器内钢液偏流在两侧呈现周期性变化,周期约为40 s.
参考文献
[1] | Ho Y,Chen C,Wang W H.ISIJ Int,1994; 24:255 |
[2] | Bai H,Thomas B G.Metall Mater Trans,2001; 32B:253 |
[3] | Miki Y J,Thomas B G.Metall Mater Trans,1999; 30B:639 |
[4] | Hershey D E,Thomas B G,Najjar F M.Int J Numer Methods Fluids,1993; 17:23 |
[5] | Bai H,Thomas B G.Metall Mater Trans,2001; 32B:269 |
[6] | Aboutalebi M R,Hasan M,Guthrie R I L.Metall Mater Trans,1995; 26B:731 |
[7] | Lan X K,Khodadadi J M,Shen F.Metall Mater Trans,1997; 28B:321 |
[8] | Bastiaansa Rob J M,Rindta C C M,Nieuwstadtb F T M,Steenhovena A A.Int J Heat Mass Transfer,2000; 43:375 |
[9] | Moser R D,Kim J,Mansour N N.Phys Fluids,1999; 4:943 |
[10] | Lesieur M,Metais O.Annu Rev Fluid Mech,1996; 28:45 |
[11] | Thomas B G,Yuan Q,Sivaramakrishnan S,Shi T,Vanka S P,Assar M B.ISIJ Int,2001; 41:1262 |
[12] | Thomas B G,Huang X,Sussman R C.Metall Mater Trans,1994; 25B:527 |
[13] | Yuan Q,Sivaramakrishnan S,Vanka S P,Thomas B G.Metall Mater Trans,2004; 35B:967 |
[14] | Yuan Q,Thomas B G,Vanka S P.Metall Mater Trans,2004; 35B:685 |
[15] | Li B K,Li D H.Acta Metall Sin,2002; 38:315(李宝宽,李东辉.金属学报,2002; 38:315) |
[16] | Li B K,Tsukihashi F.ISIJ Int,2001; 41:844 |
[17] | Li B K,Okane T,Umeda T.Metall Mater Trans,2000;31B:1491 |
[18] | Li B K,Okane T,Umeda T.Metall Mater Trans,2001;32B:1053 |
[19] | Qian Z D,Wu Y L.Acta Metall Sin,2004; 40:88(钱忠东,吴玉林.金属学报,2004; 40:88) |
[20] | Tang X L,Qian Z D,Wu Y L.J Tsinghua Univ (Sci Technol),2003; 6:802(唐学林,钱忠东,吴玉林.清华大学学报(自然科学版),2003;6:802) |
[21] | Real C,Miranda R,Vilchis C,Barron M,Hoyos L,Gonzalez J.ISIJ Int,2006; 46:1183 |
[22] | Herring J R.Front Fluid Mech,1984; 14:68 |
[23] | Germano M.J Fluid Mech,1992; 238:325 |
[24] | Smagorinsky J.Mon Weather Rev,1963; 91:99 |
[25] | Lilly D K.Mon Weather Rev,1965; 93:11 |
[26] | Van Driest E R.J Spacecr Rockets,2003; 40:1012 |
[27] | Li X S,Xu J Z,Gu C W.Sci China Ser G,2009; 1:83(李雪松,徐建中,顾春伟.中国科学G辑,2009;1:83) |
[28] | Zhang L,Thomas B G.ISIJ Int,2003; 43:271 |
[29] | Yuan Q,Thomas B G,Vanka S P.Metall Mater Trans,2004; 35B:703 |
[30] | Shi X G.Turbulence.Tianjin:Tianjin University Press,1994:190(是勋刚.湍流.天津:天津大学出版社,1994:190) |
上一张
下一张
上一张
下一张
计量
- 下载量()
- 访问量()
文章评分
- 您的评分:
-
10%
-
20%
-
30%
-
40%
-
50%