Enhancement of the operating range of a two-stage compressor for fuel cell vehicles by adopting a leading-edge inclination angle impeller
摘要
In this study, through a combined approach of numerical simulation and experimental verification, the aerodynamic performance of a two - stage centrifugal compressor for hydrogen fuel cell vehicles with different leading - edge inclinations was analyzed. The results indicate that: The impeller with a leading - edge inclination can enhance the operating range of the two - stage compressor. A positive leading - edge inclination can improve the stall margin of the compressor, enabling the compressor to achieve a better boosting effect under low - flow conditions. A negative leading - edge inclination can not only delay the choking flow of the compressor but also optimize the pressure distribution on both sides of the blade, refine the internal flow within the impeller, and reduce the occurrence of leakage.