Computational Study of a Radial Flow Turbine Operates Under Various Pulsating Flow Shapes and Amplitudes

Abstract Radial flow turbines are extensively used in turbocharging technology due to their unique capability of handling a wide range exhaust gas flow. The pulsating nature the internal combustion engine gases causes unsteady operation turbine stage. This paper presents impact various characteristics on performance radial turbine. A three-dimensional computational fluid dynamic model was coupled with one-dimensional study realistic Applying square wave showed highest degree unsteadiness corresponding 92.6% maximum mass accumulation consecutive sudden changes flowrates over entire pulse. Although sawtooth value 88.9%, entailed gradual change and resulted least overall These two extremes constrained anticipated that operates under Such constraints could develop an operating envelope predict optimize turbines’ power extraction conditions.