A Numerical Analysis of the Impact of Solidity on Bowed and Swept Cascade Flow Fields in a Transonic Compressor Cascade

A comparison of the numerical calculation results of a transonic stationary cascade with test ones shows that the above calculation results are in relatively good agreement with the test ones. To discuss the applicable conditions of bowed and swept blades in a transonic compressor, a numerical analysis was conducted of the flow fields in bowed and swept blades having bending angles ranging from 0 degree to 30 degrees under a 0 degree incidence angle with the solidity being 1.75, 1.50 and 1.25 respectively. The numerical analysis results indicate that the effectiveness of bowed and swept blades with a high solidity is quite evident. The bowed and swept blades can transform the shock waves at the leading edge into oblique ones and meanwhile weaken the intensity of blade passage shock waves, thus diminishing cascade losses caused by shock waves. It can be verified that under transonic conditions, the magnitude of solidity is an important causative factor in determining whether to use bowed blades or not in stationary cascades.