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Nowadays the increase and maintenance of a car manufacturer market share is greatly influenced by the appeal its products design, wherein the headlights occupy a distinctive position. However, the headlights designers' constant search for newer and innovative designs sometimes yields difficulties regarding the thermal management of these components, requiring cautious material selection, and special care in the parabolas dimensioning and positioning of bulbs and vents in the case. This work shows how a simulation strategy based on the finite volume method can be utilized to predict the headlight airflow and plastic walls temperature distribution induced by the bulbs thermal radiation. The main goal of this modeling is to raise and treat potential temperature issues early in the development cycle, guiding the corrective design actions, and supporting the material selection and specification process.

This paper presents an analytical methodology developed to enhance passenger cars and trucks cooling and underhood thermal management process utilizing CFD (Computational Fluid Dynamics) technology. Aspects of vehicle frontal openings definition process based on isolated cooling package components airflow requirements are presented as well as the selection and specification of heat exchangers and fans, and the air flux and temperatures distribution management in the engine compartment.

A vehicle cooling system development and optimization success is strongly dependent on the prevention of recirculation zones and other areas of heat transfer and air flow concerns generated by underhood components. Traditionally, noise insulation package is defined without considering its impact on the thermal environment surrounding it. However, the airflow restriction created by the noise shields surfaces may become a huge air flow issue. This situation is usually verified on trucks designed for tropical markets and submitted to severe environments. This paper presents a development strategy coupling cooling and underhood air flow management package specification with pass-by-noise insulators design. The interaction between cooling and pass-by-noise developments must avoid the necessity of a later redesign phase. A CFD software, lab sound intensity noise source ranking tests as well as vehicle cooling testing are suggested as development tools.