Suitable slot structure of the compressor blade can generate high-momentum jet flow through pressure difference between the pressure and suction surface, it has been proved that the slot jet flow can reenergize the local low-momentum fluid to effectively suppress the flow separation on the suction surface. In order to explore a slotted method for better comprehensive suppressing effects on the boundary layer separation near blade midspan and the three-dimensional corner separation, a diffusion stator cascade with large camber angle is selected as the research object. Firstly, the Slotted_1 and Slotted_2 whole-span slotted schemes are set up, then the Slotted_3 scheme with whole-span slot and blade-end slots is proposed, finally the performance of original cascade and slotted cascades is computed under a wide range of incidence angles at the Mach number of 0.7. The results show that: in the full range of incidence angles, compared with the whole-span slotted cascades, the development of the endwall secondary flow on the suction surface of Slotted_3 cascade is effectively suppressed, the degree of the mutual interference between the secondary flow and the main flow is reduced. Besides, on the suction surface of Slotted_3 cascade, the boundary layer separation near blade midspan and the corner separation are basically eliminated. As a result, compared with those of original cascade, the total pressure losses of Slotted_3 cascade are reduced in the full range of incidence angles, and its operating range of incidence angles is broadened. Moreover, compared with the whole-span slotted schemes, Slotted_3 scheme has a better adaptability to wide range of incidence angles.
Wang, H., Liu, B., & Zhang, B. (2020). Passive Control with Blade-End Slots and Whole-Span Slot in a Large Camber Compressor Cascade. Journal of Applied Fluid Mechanics, 14(3), 703-714. doi: 10.47176/jafm.14.03.32098
MLA
H. Wang; B. Liu; B. Zhang. "Passive Control with Blade-End Slots and Whole-Span Slot in a Large Camber Compressor Cascade", Journal of Applied Fluid Mechanics, 14, 3, 2020, 703-714. doi: 10.47176/jafm.14.03.32098
HARVARD
Wang, H., Liu, B., Zhang, B. (2020). 'Passive Control with Blade-End Slots and Whole-Span Slot in a Large Camber Compressor Cascade', Journal of Applied Fluid Mechanics, 14(3), pp. 703-714. doi: 10.47176/jafm.14.03.32098
VANCOUVER
Wang, H., Liu, B., Zhang, B. Passive Control with Blade-End Slots and Whole-Span Slot in a Large Camber Compressor Cascade. Journal of Applied Fluid Mechanics, 2020; 14(3): 703-714. doi: 10.47176/jafm.14.03.32098
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