摘要
建立电磁搅拌法制备A356铝合金半固态浆料过程的电磁场、温度场和流体力学场多场耦合的二维数值模型,采用Powerlaw cut-off(PLCO)半固态模型来描述铝合金浆料的流场,并利用有限元软件ANSYS和编程软件INTEL FORTRAN相结合对电磁场、温度场和流场耦合模拟,研究多场搅拌参数对电磁场、温度场和流场的影响规律。模拟结果表明,搅拌频率和搅拌电流增加时会使电磁场增大且分布不均匀,从而造成浆料流速迅速增大并且分布不均匀。进一步获得电磁搅拌法制备A356铝合金半固态浆料的合理搅拌参数。在所研制的试验装置上验证了数值模拟的可靠性。
A two-dimensional model coupling of the electromagnetic field, temperature field and flow field ofA356 alloy semi-solid slurry preparation by electromagnetic stirring （EMS） method is established. The power law cut-off （PLCO） semi-solid model is used to model the slurry. The effects of EMS parameters such as stirring frequency and stirring current on the electromagnetic field, temperature field and flow field are investigated by finite element code ANSYS combined with secondary development INTEL FORTRAN software. The results show that, electromagnetic field increases but non-uniformly distributes as stirring frequency and stirring current increase, as a result, flow field increases but non-uniformly distributes. The reasonable stirring parameters for A356 alloy semi-solid slurry preparation by EMS are obtained. The simulation results are verified with corresponding experiments.
出处
《机械工程学报》
EI
CAS
CSCD
北大核心
2012年第14期50-57,共8页
Journal of Mechanical Engineering
基金
国家自然科学基金资助项目(50975222)
关键词
半固态
电磁搅拌
浆料制备
A356铝合金
数值模拟
Semi-solid Electromagnetic stirring Slurry preparation A356 aluminum alloy Numerical simulation
