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The containment test in turbocharger is performed to examine the bursted wheel containing capability of the turbine housing. The experimental test demands high investments and is time consuming. Hence, the containment test for turbocharger is simulated using Explicit Dynamics. To facilitate wheel burst, the groove is cut in the back face of the wheel to weaken it. The wheel burst simulated with circumferential groove as the weakening slot, gives an unequal number of fragments even though the analysis model is cyclic symmetric. This gives inappropriate results through containment analysis. One of the major reasons for randomness in fragment size is meshing of the model. This paper presents various meshing concepts for midrange and light duty wheel to obtain the equal number of fragments. The Pugh selection method was employed to select the mesh concept by rating the concepts against different criteria to minimize randomness in fragment size along with maintaining the accuracy of solution. Different mid-range and light duty wheels when evaluated with highest rated mesh concept gave expected burst scenario.

Mesh Sensitivity Study of Turbine Wheel Burst Analysis using Explicit Dynamics