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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。
Finite element fluid thermal analysis software (CFD) is often used to simulate the heat dissipation of LED lamps. The analysis, calculation and setting of parameters related to heat dissipation are the key factors affecting the simulation accuracy. The key issues such as boundary condition setting, thermal resistance calculation, thermal load analysis and heat sink simulation modeling are comprehensively studied. The accuracy of the simulation method is verified by combining with the laboratory temperature measurement. The results show that this method can accurately analyze the heat dissipation of indoor lighting LED lamps. The simulation temperature error is about 4 ℃. The simulation results have important reference value for the development and design of LED lamps.