北京科技大学学报
北京科技大學學報
북경과기대학학보
JOURNAL OF UNIVERSITY OF SCIENCE AND TECHNOLOGY BEIJING
2014年
12期
1634-1642
,共9页
唐娜娜%李宏祥%张济山%庄林忠
唐娜娜%李宏祥%張濟山%莊林忠
당나나%리굉상%장제산%장림충
连铸%小方坯%温度场%流场%有限元法%实时模拟
連鑄%小方坯%溫度場%流場%有限元法%實時模擬
련주%소방배%온도장%류장%유한원법%실시모의
continuous casting%billets%temperature field%flow field%finite element method%real-time simulation
为了寻求在瞬态下仍然有效的实时模拟模型,以便模拟连铸的全过程,基于任意拉格朗日-欧拉( ALE)方法和Lam-Bremhorst低雷诺数k-ε方程,建立了考虑湍流的传热和流体流动的实时模拟模型。该模型有效地实现了移动计算域下的动态网格扩展,可以模拟从拉坯到切割坯连铸全过程的温度场与流场的变化。作为实例,X70钢小方坯的模拟效果与实验验证吻合很好。
為瞭尋求在瞬態下仍然有效的實時模擬模型,以便模擬連鑄的全過程,基于任意拉格朗日-歐拉( ALE)方法和Lam-Bremhorst低雷諾數k-ε方程,建立瞭攷慮湍流的傳熱和流體流動的實時模擬模型。該模型有效地實現瞭移動計算域下的動態網格擴展,可以模擬從拉坯到切割坯連鑄全過程的溫度場與流場的變化。作為實例,X70鋼小方坯的模擬效果與實驗驗證吻閤很好。
위료심구재순태하잉연유효적실시모의모형,이편모의련주적전과정,기우임의랍격랑일-구랍( ALE)방법화Lam-Bremhorst저뢰낙수k-ε방정,건립료고필단류적전열화류체류동적실시모의모형。해모형유효지실현료이동계산역하적동태망격확전,가이모의종랍배도절할배련주전과정적온도장여류장적변화。작위실례,X70강소방배적모의효과여실험험증문합흔호。
To develop a real-time mathematical model which can be valid ever at a transient state for simulating full continuous casting processes, a real-time simulation mathematical model of heat transfer and fluid flow was constructed considering turbulent flow on the basis of the arbitrary Lagrangian-Eulerian ( ALE) algorithm and the Lam-Bremhorst low-Reynolds number k-εformulation. By using this model, dynamic grids expansion under moving computational domains could be realized and the temperature field and fluid flow field could be simulated for the full process of steel continuous casting. As an example, the simulation results of X70 steel are in accordance with experimental measurements.