Abstract
As a core component of a turbocharger, the efficiency of compressor directly affects its overall efficiency. The finite element model and mesh model of JQ40A turbocharger impeller is built by using Software Numeca in this paper. The compressor efficiency and the flow field with different inlet blade angle, the pressure surface boundary layer with different blade thickness are simulated in the case of the same outlet angle, throat area of and number of the blades. The result of the simulation and research shows that it is the inlet blade angle of 51.40 degrees and the average blade thickness of 0.5mm that make it the best design with highest efficiency .
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