消失模铸造充型过程的计算模型  

Mold filling model for lost foam casting

作　　者：李锋军[1] 沈厚发[1] 柳百成[1] 

机构地区：[1]清华大学机械工程系,北京100084

出　　处：《清华大学学报（自然科学版）》2003年第5期586-589,共4页Journal of Tsinghua University(Science and Technology)

基　　金：国家自然科学基金重大项目(59990470-3);国家"九七三"重点基础研究项目(G2000067208-3)

摘　　要：根据消失模铸造充型过程的特点,提出了一种消失模铸造液态金属充型流场、温度场及界面推移的计算模型。用人工神经网络方法计算了充型过程中不同时刻液态金属模样界面的位置。结合界面位置及边界条件,通过求解N-S方程和能量方程计算了消失模铸造充型过程的流场及温度场。界面推移过程的实验表明,模拟计算结果在充型形态及充型时间方面与实际测试结果相符。A model was developed to calculate the fluid flow, temperature distribution, and moving metal front during mold filling of a lost foam casting based on its characteristics. The artificial neural network technique was used to calculate the molten metal front locations at different times. These calculated interface locations were combined with appropriate boundary conditions to calculate the velocity and temperature distributions in the molten metal during the mold filling process by numerically solving the NavierStokes and energy equations. The simulation of filling pattern and time is consistent with experimental results.

关 键 词：消失模铸造 充型过程 计算模型 自由表面 人工神经网络 

分 类 号：TG249[金属学及工艺—铸造] TG244