In this review, a summary and discussion of the current state of the art on computational and experimental analysis of unsteady flow effects on turbocharger turbine performance is presented. The numerical methods, for CFD analysis are first introduced and explained together with their unique advantages and limitations. Details on several approaches and test facilities used in experimental analysis of unsteady flow effects on turbine performance are compared and criticised. Conclusions of the results and discussion comprise recommendations for more accurate acquisition of data and justifications for future work needed in this field, including a twin entry volute design alteration that could reduce pulse energy loss.

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