Abstract
ABSTRACTThe compressor wheel of a turbocharger is one of the highly stressed components in automotive engines. The compressor wheel undergoes variations in rotational speed, depending on vehicle operating conditions. These variations cause cyclic mechanical load in the wheel which results in fatigue stress. The continuous operation with fatigue stress results in fatigue fracture and failure. The fatigue is classified as low-cycle fatigue and high-ycle fatigue based on the number of load cycles to failure and type of fracture growth. The present work is focused on the analysis of the compressor wheel that includes measurement of load–time histories in terms of turbocharger speed for different vehicle duty cycles, finite element analysis simulation of stress distribution in the compressor wheel for given load conditions, prediction of fatigue life of the compressor wheel using cumulative damage accumulation theory and the various possibilities for improving the compressor wheel fatigue life.
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