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为准确计算LED光场以及内部温度场的分布,结合有限体积数值模拟、非成像光学方法建立了单个LED光学以及热学模型,并通过实验测试证实模型的有效性。在此基础上,采用能量叠加原理讨论了LED弧面阵列系统目标平面区域的照度分布,得到了在特定距离的目标平面上均匀的照度分布。通过对复合型散热器系统结构中散热通道内钉柱与翅片的位置尺寸、基板厚度和器件间距的优化设计,增强了热交换效果。
In order to accurately calculate the distribution of the LED light field and the internal temperature field, a single LED optical and thermal model was established by combining the finite volume numerical simulation with the non-imaging optical method. The experimental results show the effectiveness of the model. On this basis, the illumination distribution of target area of LED arc array system is discussed by energy superposition principle, and the uniform illuminance distribution is obtained on the target plane of a certain distance. The heat exchange effect is enhanced by the optimal design of the location size of the studs and fins, the thickness of the substrate and the pitch of the devices in the cooling channel of the composite heat sink system.