ABS材料熔融沉积成型过程中换热系数的反求  

Inverse Calculation of Heat Transfer Coefficient in the Process of Melting and Deposition of ABS Material

作　　者：王靖[1] 李自良[1] 杨东方[1] 祁冬杰 李永青[1] 

机构地区：[1]昆明理工大学机电工程学院,云南昆明650500

出　　处：《塑料科技》2017年第5期27-31,共5页Plastics Science and Technology

摘　　要：熔融沉积成型过程的换热系数是建立热边界条件的重要参数,也是温度场模拟过程的关键参数。本文推导出熔融沉积成型过程的热传导控制方程组有限差分格式。依据此方程组,考虑了熔融沉积成型过程中的内热源和相变潜热,以及热物理性能参数的变化,借助非线性迭代估算理论得到熔融沉积成型过程中表面综合换热系数的增量。在此基础上,利用MATLAB软件编写了反求换热系数程序,并进行了数值模拟,将模拟结果与实测结果进行比较,验证了计算结果的有效性。结果表明,本文所述方法是一种有效计算换热系数的方法。The heat transfer coefficient in the process of melting deposition is an important parameter to establish thermal boundary condition,and is also the key parameter of temperature field simulation.The finite difference scheme of heat conduction control equations for molten deposition modeling is derived,based on this equation group,which considering the internal heat source and the latent heat of phase change in the process of melting and deposition,and the change of thermal-physical parameters,by using the nonlinear iterative estimation theory of FDM,obtained the incremental quantity of the surface heat transfer coefficient,and then on the basis,by using the MATLAB software,wrote a heat transfer coefficient inverse method program and the numerical simulation,and the simulation results and the measured results were compared to verify the availability of the calculation results.The results show that the method described in this paper is an effective method to calculate the heat transfer coefficient.

关 键 词：丙烯腈-丁二烯-苯乙烯共聚物 换热系数 熔融沉积成型 有限差分 

分 类 号：TQ325.2[化学工程—合成树脂塑料工业] TK124[动力工程及工程热物理—工程热物理]