| As the current level of technology of the semiconductor manufacturing technology limitations,resulting a high temperature in high-power LED automotive lamp when the lamp was in the stable operation.If the temperature is too high when LED light works,it will lead to reduce luminous efficiency,shorten the life of LED lights,cause failures and other issues.Therefore,adding a cooling device is particularly necessary for high-power LED lights.Based on the theory of heat transfer,computational fluid dynamics and other subjects,for the heat dissipation problem of the high power LED automotive lamp,using some methods was used such as theoretical analysis and finite element simulation and experimental validation for the following research work:(1)The research on simulation model of LED vehicle lamp’s fins radiator under natural convective heat dissipation.Aiming at a fin radiator of an LED low beam light,the heat conduction simulation model was established by a reasonable simplification,and the temperature field distribution of the fin radiator was obtained by FLUENT software when the lamp was in the stable operation.(2)The research on simulation modeling and thermal performance of air-cooled radiator for LED vehicle lamp under forced convection cooling.The simulation modeling method of air cooled radiator,for the temperature field distribution and the surrounding flow distribution field of the air-cooled radiator.Meanwhile,the influence of air temperature,air volume of the fan and LED power on the performance of air-cooled radiator is further studied,provided a reference for the design of the LED lamp air-cooled radiator.(3)A simplified thermal analysis modeling of the air-cooled radiator was proposed.The relationship between fan flow and convective heat transfer coefficient was studied,and an equivalent modeling analysis table of air-cooled radiator was established.When designing thesame type air-cooled radiator,the equivalent modeling analysis table can improving the efficiency of design and simulation of air-cooled radiator.At the same time,the LED lamp complete cooling system are analyzed in the simulation modeling,further illustrate the applicability of the air-cooled radiator simplified modeling method.(4)For the lamp under the actual environment that multiple radiators need to work at the same time which cause the problem that cooling air source is needed,the LED lamp cooling principle model used to simulate the working environment of the lamp was established.Consider the factors such as the position and corner of the fan in the lamp cooling model,the optimal mathematical model of wind source parameters was established,getting the best combination of wind source parameters using the orthogonal optimization method.(5)The experiment plan was designed,the experiment platform was built,the temperature field on the stable working LED vehicle lamp’s fin radiator was detected,and the rationality of the thermal conduction simulation model was verified through the error analysis.In summary,this paper mainly studied the high power LED light of two common radiator(fin radiator and air-cooled radiator)simulation modeling methods,analyzed the LED lamp radiator cooling effect in stable work,focused on the LED lamp air-cooled radiator cooling performance,simplified the modeling method and mathematical model for optimal design of multiple parameters of air radiator.In a word,the paper’s research work is helpful to improve the develop quality and efficiency of high power LED automotive lamp. |
