湿空气对压气机裕度边界性能的敏感性分析OA

Addressing the impact of wet air conditions on compressor instability processes,this paper analyzes the phase-change cooling process of wet compression in a compressor based on the Euler-Lagrange multiphase flow gov-erning equations.The aerothermal characteristics of different wet air flow regime coupling processes within the com-pressor were obtained,and the sensitivity of flow and heat transfer during wet compression to the compressor stabil-ity margin boundary was evaluated.The results indicate that,with spray flow rate ranging from 0.5%to 8%and av-erage droplet sizes from 3 μm to 200 μm,near the compressor's near-stall boundary,wet compression can reduce the flow field temperature by 25 K to 49 K,while improving compressor efficiency by 0.25%to 4%.However,near the compressor's near-surging boundary,due to reduced droplet evaporation,the temperature change in the flow field is less than 10 K.Additionally,the inertia resistance of the droplets expands the range of low-speed air-flow around the rotor blades(from 25 m/s to 97 m/s),causing the compressor surge boundary to shift left,thus re-ducing the stable operating range.