摘要
针对COB-LED(Chip on Board-Light Emitting Diode)散热问题,文中基于二维热传导方程建立了一个可快速计算COB-LED散热器表面热分布的数学模型。为了便于模型求解,采用有限差分法求解该数学模型并选择交替方向隐格式作为其差分格式。根据模型中的边界条件和初始条件设计COB-LED常温点亮实验,并基于ANSYS有限元分析软件进行仿真分析。通过比较求解结果、仿真结果和实验结果验证该数学模型的合理性。结果表明,求解结果与实验结果中最高温度相对误差约23.57%,且两者的温度变化趋势一致。求解结果与仿真结果中最高温度相对误差约34.84%,且温度分布较为接近,证明了该数学模型的合理性与正确性。
For solving the problem about heat dissipation of COB-LED(Chip on Board-Light Emitting Diode),a mathematical model is established based on two-dimensional heat conduction equation which can quickly calculate heat distribution on the surface of COB-LED heat sink in this study.In order to facilitate the solution of the model,the finite difference method is used to solve the mathematical model and the alternate direction implicit scheme is chosen as its difference scheme.According to the boundary conditions and initial conditions in the model,the COB-LED normal temperature lighting experiment is designed,and the simulation analysis is carried out based on ANSYS finite element analysis software.The rationality of the mathematical model is verified by comparing the solution results,simulation results and experimental results.The results show that the relative error of the maximum temperature between the solution result and the experimental results is about 23.57%,and the temperature variation trend of the two is consistent.The maximum temperature relative error between the solution result and simulation results is about 34.84%,and the temperature distribution is close.The rationality and correctness of the mathematical model are proved.
作者
王朝瑞
杨平
韩帅
徐新营
WANG Chaorui;YANG Ping;HAN Shuai;XU Xinying(School of Mechanical Engineering,Jiangsu University,Zhenjiang 212013,China)
出处
《电子科技》
2024年第3期68-74,共7页
Electronic Science and Technology
基金
国家自然科学基金(51575246)。
关键词
热传导方程
有限差分法
交替方向隐格式
数学模型
LED散热器
温度分布
实验验证
仿真分析
heat conduction equation
finite difference method
alternative direction implicit scheme
mathematical model
LED heat sink
temperature distribution
experimental validation
simulation analysis
作者简介
王朝瑞(1997-),男,硕士研究生。研究方向:LED热传导特性与智能优化。杨平(1964-),男,博士,教授。研究方向:微/纳/光电子器件集成结构跨尺度构造、LED跨尺度构造与寿命预测、高密度电子封装制造与可靠性、新能源光电转换器件与材料改性。
