| Citation: | LI Jinguang, WU Hu, YANG Chen. Study on design of transonic axial-flow fans based on time-marching throughflow inverse design method[J]. Journal of Aerospace Power, 2025, 40（9）：20250033 doi: 10.13224/j.cnki.jasp.20250033
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A throughflow inverse design method for multi-stage axial-flow fans was developed based on computational fluid dynamics (CFD) theory. A robust numerical method was proposed based on the approximate factorization method to impose the inviscid blade force on the blades accurately. The process was applied to the redesign of a two-stage transonic fan, and the design was validated through full three-dimensional numerical simulations. The results showed that the program can robustly and efficiently achieve complete convergence of the throughflow design, with the meridional flow fields in good agreement with the three-dimensional circumferentially averaged results. Through full three-dimensional simulation validations, the present design results achieved the target mass flow rate and total pressure ratio under the design point. At off-design operations, the current configuration demonstrated complementary advantages compared with the prototype: While peak efficiency experienced slight reductions at off-design rotational speeds (with a maximum reduction of 1.04%), the stability margin and stall pressure ratio showed maximum improvements of 1.7% and 1.26%, respectively.
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