| Citation: | FAN Zhonggang, BA Dun, QIU Jiahui, et al. Integrated design optimization of blade and casing treatment in axial compressor[J]. Journal of Aerospace Power, 2024, 39（7）：20220069 doi: 10.13224/j.cnki.jasp.20220069
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An integrated optimization design platform of blade and casing treatments in a low-speed axial compressor was constructed. A practical partitioning approach for free-form deformation (FFD) parameterization combined with engineering parameters was applied to achieve multi-objective optimization. Taking both efficiency and stall margin into consideration, the optimal design improved the stall margin by 7.21% with negligible peak efficiency variation. After analysis and calculation of blockage and loss distribution, the influence mechanism on stall margin and efficiency was further studied. Results showed that with the combined effected of deformed blade and casing treatment, the location of peak blockage moved downstream from 24.7% rotor tip chord to 33.6% rotor tip chord, and the location of peak efficiency moved downstream from 21.4% rotor tip chord to 30.6% rotor tip chord. The main reason for stall margin improvement was attributable to the suppression of tip leakage and the elimination of low energy blockage flow at tip region.
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