LED灯具散热建模仿真关键问题研究

Research on Key Problems of Modeling Simulation of LED Heat Dissipation

有限元流体热分析软件(CFD)常被用于对LED灯具散热进行建模仿真,与散热相关的参数分析、计算与设置等问题是影响仿真精度的关键因素。综合研究了边界条件设置、热阻计算、热量载荷分析和散热器等仿真建模的关键问题,并与实验室温度测量相结合来验证仿真方法的准确性。结果表明,该方法对室内照明LED灯具能进行较为准确的散热分析,仿真温度误差在4℃左右,仿真结果对LED灯具开发设计具有重要参考价值。

The fluid finite element thermal analysis software （CFD） is often used in LED thermal modeling and simulation, and the analysis, calculation and setting of relevant cooling parameters are key factors affecting the simulation precision. A comprehensive research on the key problems including boundary condition setting, thermal resistance calculation and heat load analysis was carried out. Then, laboratory temperature measurement was combined with this research to validate the accuracy of the simulation method. The results show that the method can be used for accurate thermal analysis of indoor LED lighting, with the temperature error less than 4 ~C and the simulation result is of a great reference value for LED design.