Transient Fluid-Structure Interaction Analysis of Exhaust Gas Recirculation Cooler Pipes

The present paper shows how vibrations of EGR cooler tubes can be analyzed using transient fluid-structure interaction (FSI) analyses. The basis of the analysis is to use real engine test data which describe the vibrations of the cooler inlet and outlet arising from natural engine vibrations. These excitations are applied in the time domain to a three-dimensional FSI model of an EGR cooler. The response of the cooler tubes is also obtained in the time domain and can be transformed into the frequency domain using the Fourier transform. It is also shown how the error in the numerical analysis can be controlled using the goal-oriented concept of error estimation.

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