Design of transonic centrifugal compressor for vehicle

As internal-combustion engine power density has increased,turbocharger with high pressure ratio is required.With a Fully three-dimension CFD technology,a transonic centrifugal compressor with pressure ratio 4.0 for vehicle was designed and also applied to micro gas turbine.The design methods and principle of transonic centrifugal compressor were analyzed.The engine-matching test shows that,the performance of the engine improved significantly with the new designed compressor as compared to the prototype compressor.The engine fuel consumption was reduced by 4.1 g/kW·h and the inlet temperature of turbine was decreased by 35 K.