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对一单级跨声压气机设计工况下采用了3种弯、掠动叶后的非定常流场分别进行了数值模拟,分析了动叶弯、掠对级效率非定常波动的影响.研究结果表明:非定常计算条件下,动叶弯、掠后的压气机效率仍然获得大幅提高,并且效率的波动幅值同原型压气机相比明显降低,同时动叶改型前后的效率和压比的非定常波动曲线的相位发生了偏差;弯、掠动叶降低了压气机顶部和根部的分离损失,也使根部和顶部的效率波动显著降低.
Three kinds of unsteady flow field after sweeping blade were adopted under single-stage transonic compressor design condition and numerical simulation was carried out respectively, and the influence of unsteady flow on the efficiency of buckets and grayscales was analyzed. The results show that under unsteady calculation conditions, the efficiency of the compressor with curved and swept buckets still increases greatly, and the fluctuation amplitude of efficiency is obviously lower than that of the prototype compressor. Meanwhile, the efficiency and pressure ratio The deflection of the unsteady flutter curve of the compressor was reduced. The bending and swept vanes reduced the separation loss of the top and the root of the compressor, and also significantly reduced the fluctuation of the root and top efficiency.