不同来流边界层下端壁扫频射流对压气机角区分离的控制效果研究OA

Developing efficient and reliable active flow control technologies is a key approach to further improving the performance of axial compressors and pushing the performance limits of aero-engines.In addressing the issue of flow separation in the corner region of an axial flow compressor,an active flow control technique called sweeping jet actuator(SJA)was employed.Numerical simulations were conducted to investigate the impact of endwall SJA jets on mitigating flow separation in the compressor's corner region.The results show that the total pressure loss of the end-wall sweeping jet control cascade is smaller than that of the prototype cascade,and the maximum total pressure loss coefficient can be reduced by 10.02％,and it has better control ability in the diagonal region under various types of inlet boundary layer.Analysis on the evolution of three-dimensional streamlines in the flow field shows that the unsteady sweeping jet generated by the SJA directly acts on the low-energy fluid accumulated in the corner region near the endwall,thereby suppressing the formation and development of concentrated corner vortices and consequently reducing the losses.It provides a new perspective for the development of advanced unsteady active flow control technologies for axial compressors.