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The continuous improvement of input power and device integration of high-power LED automotive lighting enables the chip junction temperature increase rapidly in a short period of time, reduces its service life and luminous efficiency. Thus improving heat dissipation of LED automotive lighting is a major issue of the present studies. A micro-arc oxidation ceramic coating with a micro-porous structure was prepared on the surface of the aluminum alloy radiator by using micro-arc oxidation surface treatment technology to increase its heat dissipation surface area, the chimney effect produced by the porous structure of the ceramic membrane was used to enhance the convection of heat. This paper utilized ANSYS software to simulate the heat dissipation performance of micro-arc oxidation ceramic coating of high-power LED aluminum alloy radiator, and studied the effect of micro-arc oxidation ceramic coating thickness and porosity on the heat dissipation performance of the radiator. The results show that, when the thickness of the ceramic coating is 28 μm and the porosity is 50.26%, the LED aluminum alloy radiator has the highest thermal conductivity, the smallest thermal resistance value, the best heat dissipation performance.
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| 科 Family | 属数 Number of genus | 种数 Number of species | 占总种数比例 Percentage of total species (%) | 属 Genus | 种数 Number of species | 占总种数比例 Percentage of total species (%) |
|---|---|---|---|---|---|---|
| 鹅膏菌科Amanitaceae | 2 | 11 | 5.26 | 鹅膏菌属 Amanita | 10 | 4.78 |
| 小菇科 Mycenaceae | 2 | 12 | 5.74 | 丝盖伞属 Inocybe | 5 | 2.39 |
| 多孔菌科 Polyporaceae | 8 | 14 | 6.70 | 蜡蘑属 Laccaria | 5 | 2.39 |
| 红菇科 Russulaceae | 3 | 23 | 11.00 | 小皮伞属 Marasmius | 6 | 2.87 |
| 小菇属 Mycena | 11 | 5.26 | ||||
| 光柄菇属 Pluteus | 5 | 2.39 | ||||
| 红菇属 Russula | 17 | 8.13 | ||||
| 栓菌属 Trametes | 5 | 2.39 |
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