A Study of Evaluation Method for Turbocharger Turbine Based on Joint Operation Curve

Turbochargers have evolved with the advancement of engine technology. In this study, we pro-posed a concept joint operation, based on operating characteristics compressor and turbine. Furthermore, turbine evaluation method was proposed concept, an optimization application study impeller blade number casing con-ducted verified. The results showed that performance point could predict trend more accurately, output power optimized our new evidently had advantages over original turbine, better overall performance. single-entry be into 9-blade twin-entry having response characteristics. maximum torque 5.4% higher than engine, minimum brake specific fuel consumption (BSFC) reduced by 2.1%. low medium speed region, increased up to 3.2% BSFC 1.1% compared conventional methods. Hence, effect proven.