Light elements in a vehicle are not only compelled to satisfy technical requirements, i.e. a sufficient illumination of the road, but represent an important styling element of modern cars. The design of the exterior form of headlights and rear lights starts in the early phases of development. The component designer is bounded to reconcile the demands for the design with the technical requirements. Due to the steadily decreasing developmental periods for cars, the lights must be conceived in a very early stage of the design process, corresponding to functionality, price, illumination and, of course, quality. For this purpose numerical simulation methods are indispensable. This paper presents a numerical method to calculate temperature distributions inside the headlamp and on the lens. The efficiency of the numeric simulation in car development has been exemplified by the temperature simulations in headlamps and direction indicators. For comparison experimental and numerical results obtained for an Audi A2 headlight are included. An upgrading of the mathematical models used in commercial codes, for example the consideration of the specular radiation, is necessary. The physically correct and fast calculation of component temperatures in an early stage of development makes the evaluation of design drafts possible. The quick and correct prediction of temperatures in the early phases enables the evaluation of design concepts, supports the development of lighting systems, and helps to ensure high quality while meeting the latest legal requirements.
Thermal analysis in automotive components
Thermoanalyse von Fahrzeugbauteilen
2005
10 Seiten, 6 Bilder, 1 Tabelle, 7 Quellen
Conference paper
English
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