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Transient numerical computation of the temperature of the electronic equipment in passengers cars

Abstract : In order to ensure a reliable operation of the electronic devices of a passenger car, its thermal situation is successively evaluated during each phase of the development process. Of particular interest is to predict the time period, during which the electronic system works within its optimal temperature range, while it is subjected to critical operating conditions. In order to compute its temperature under time-dependent thermal loads, different numerical models and computational methods have been developed and validated in the present study. In a first part, several innovative coupling codes strategies for the computation of the different heat transfer modes are proposed according to the convection boundary conditions and based on a system analysis. For reasonable computing times in the development process, a steady-state approach is used to solve the convective flow. In a second part, numerical models for the computation of the convective heat transfer mode are examined with test cases, in particular in view of mesh requirements and turbulence modeling, and verified in comparison with literature.In the third and last part, the co-simulation strategies are verified by means of two complex electronic systems, on the one hand a lead-acid battery situated in a spare-wheel cavity, on the other hand a sound amplifier assembled in cavity located between the engine compartment and the cabin. Finally, the efficiency and the reliability of both co-simulation strategies are discussed for implementation in the digital development process.
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Submitted on : Thursday, November 26, 2020 - 4:14:22 PM
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  • HAL Id : tel-03026324, version 1

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Florence Michel. Transient numerical computation of the temperature of the electronic equipment in passengers cars. Mechanics [physics.med-ph]. Université de Valenciennes et Hainaut-Cambrésis, 2009. English. ⟨NNT : 2009VALE0017⟩. ⟨tel-03026324⟩

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