车用增压器涡轮熔模铸造过程数值模拟优化  

Numerical Simulation and Optimization of Investment Casting Process of Auto Turbocharger Turbine

作　　者：贾志宏[1] 符浩 张义刚 谢道存 景文祥 李晨阳 张泽坤 连毓东 JIA Zhi-hong;FU Hao;ZHANG Yi-gang;XIE Dao-cun;JING Wen-xiang;LI Chen-yang;ZHANGZe-kun;LIAN Yu-dong(School of Materials Science and Engineering,Jiangsu University,Zhenjiang212013,Jiangsu,China;Wuxi Vane Wheel Engineering Co.,Ltd.,Wuxi 214021,Jiangsu,China)

机构地区：[1]江苏大学材料科学与工程学院,江苏镇江212013 [2]无锡范尼韦尔工程有限公司,江苏无锡214021

出　　处：《铸造》2022年第6期760-765,共6页Foundry

摘　　要：以车用增压器涡轮为例,探讨了合金及型壳的主要热物性参数,实施了铸件凝固测温试验,基于Beck非线性估算法得到了合金与型壳随温度变化的界面换热系数。采用优化后的输入条件进行充型凝固模拟,结果表明,铸件凝固的实际温度场与模拟温度场吻合程度较好,并且实际浇注后叶片叶梢处可能出现的浇不足缺陷与模拟结果基本一致,以此验证了数值模拟的准确性和可靠性。Taking the auto turbocharger turbine as an example,the main thermal physical parameters of the alloy and the mold were discussed,the temperature measurement test of the casting solidification was carried out,and the interfacial heat transfer coefficient between the alloy and the mold shell varying with temperature was obtained based on Beck nonlinear estimation method.The results showed that the actual temperature field of the casting solidification was in good agreement with the simulated temperature field,and the possible misrun defect at the blade tip after actual pouring were basically consistent with the simulation results,which verifies the accuracy and reliability of the numerical simulation.

关 键 词：增压器涡轮 热物性参数 界面换热系数 数值模拟 

分 类 号：TG249.4[金属学及工艺—铸造]