Numerical Study on Performance Adjustment of Inlet Guide Vanes on Mixed-flow Impeller Stage
The influence and adjustment characteristics of two different profile inlet guide vanes with different opening on the gas flow in the mixed-flow stage with super-large flow coefficient are studied numerically.The performance curves of the coupling of inlet guide vane and mixed-flow impeller under different guide vane opening are predicted.The results show that the inlet guide vanes can effectively expand the adjustment range,enabling the mixed-flow compressor to operate within a wider working range.The opening and profile of the guide vane will affect the aerodynamic performance of the mixed-flow impeller.The increase of the opening will increase the non-uniformity of the gas flow.When the opening increases to a certain extent,the adjustment capacity of the inlet guide vane will become worse,which will have a negative impact on the aerodynamic performance of the mixed-flow impeller.
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