Table 1: Lamp Main parts and material description: Parts That is why engineers very often perform simulations for these lamps as well. The wattage of these bulbs is generally small, but as these signal bulbs are cramped to a smaller area, it may end up heating the lens and reflector way above HDT values. These two signal lamps may contain separate reflector parts and lens parts. Often, two turning signal bulbs will be at the sides of headlamps. Sometimes companies prefer to simulate the headlamps along with the front turning lamp. Headlamp consists of a signal turning bulb. Tail lamp simulation is done by turning ON both the tail function and stop function filament. Tail lamps consist of tail function filament and stop function filament. Tail lamps are generally smaller in size as compared to headlamps, so to avoid high temperatures, they should be carefully designed. However, some companies also tend to perform analysis by turning ON both high beam and low beam filaments to predict the maximum temperature in the worst-case scenario. Generally, analysis of the former is more preferred than high beam one because when the Low beam filament is switched ON, the lamp parts get more heated. The Low beam filament is situated closer towards the lens and the High beam filament is placed closer towards the bulb holder. The bulb of the headlamp consists of two filaments called High beam and Low beam filament. There are mostly three kinds of simulation done for Automotive lamps as follows: Since many parts are interlinked, thermal conduction plays a crucial role in heat distribution especially when automotive lighting systems contain Led chips and PCB.Īs all three modes of heat transfer are involved in this simulation, various parameters are needed to benchmark to get the correct results. Hence, proper selection of the radiation model is important to get accurate results. Radiation affects the heat wattage from the filament or led source chip and increases the following – temperature of the bulb, reflector, housing, lens, etc. Radiation is the key source of heat transfer in lamps. The thermal simulation of automotive lamps comes under conjugate heat transfer type of analysis in which all the modes of heat transfer are essential to model.
Ansys icepak software#
The role of CFD simulation in Automotive lamp designing?Ĭoming to the main question – “What is the role of Computational Fluid Dynamics and software tools such as ANSYS in designing the automotive lighting system”?ĬFD simulations can play a crucial role in optimizing various design parameters such as lamp size, the distance between bulb and lens, number of vents, vent location, and selection of materials according to the design requirements.
The critical limit is usually the heat deflection temperature & the maximum temperature on the parts of the lighting system should be well below their respective material HDT values. Hence it is essential to design the automobile lamps such that even at an extreme ambient temperature, the temperature on each part is maintained well below the critical limit. Out of the parts mentioned above, bulb and led are the two primary sources of lighting that generate a lot of heat energy.
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