YUAN Yi-xi， ZHENG Biao-jie， TENG Jin-fang.Numerical Simulation of the Effect of Different Inlet Boundary Conditions on the Performance of Shrouded Stator of Compressor[J].航空发动机,2024,50(6):48-53
Numerical Simulation of the Effect of Different Inlet Boundary Conditions on the Performance of Shrouded Stator of Compressor
DOI：
Key Words:multistage compressor  shrouded stator  inlet boundary condition  aerodynamic performance  leakage flow  aeroengine
Author NameAffiliation
YUAN Yi-xi， ZHENG Biao-jie， TENG Jin-fang School of Aeronautics and Astronautics，Shanghai Jiao Tong University，Shanghai 200240， China 
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Abstract:In order to investigate the effect of total pressure and flow angle on the shrouded stator aerodynamic performance and flow field details in a multistage compressor, the third stage rotor, stator and downstream rotor in a 4-stage low speed research compressor (LSRC) were taken as the research object. By changing the total pressure and flow angle of the third-stage inlet boundary condition, three inlet boundary conditions were simulated by steady numerical method. The results indicate that the shrouded stator dynamic performance improves when the inlet total pressure decreases, and the total pressure loss decreases by 13.18% in the lower 20% span near the hub region. The thickness of the boundary layer on the suction side becomes thinner. The rise of leakage flow in the radial direction is restrained. The total pressure loss decreases by 9.80% near the hub region when the inlet flow angle decreases, and the static pressure coef? ficient at the outlet increases. The variation of the radial distribution of deviation angles is larger, and the region of high radial velocity appears on the suction side at the outlet section. The vortex in the passage deflects to the suction side and integrates into the corner zone, resulting in the variation of outflow angle reaching 4°. The results of this study can provide a quantitative reference for the influence of the difference between the inlet boundary conditions of numerical simulation and experimental tests on the calculated results.
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