Soot Mass Limit Prediction via Coupled Thermo-Mechanical Stress Analysis

Grigorios  Koltsakis, Aristotle University Thessaloniki

DPF failure during ‘worst-case’ regeneration events may either be a result of overheating or exceeding the critical mechanical stress limit. In the latter case the failure is substantially linked with thermal gradients resulting from local non-uniformities of the temperature, flow and soot distributions in the DPF. In the present contribution, the coupling between the 3-d DPF regeneration model ’axitrap’ with a validated stress analysis software is presented. Facilitated by advanced, CPU efficient solvers, it is possible to analyze systematically the role of DPF geometrical and thermomechanical properties on soot mass limit.

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