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对一单级跨声压气机设计工况下动叶弯掠前后的非定常流场分别进行了数值模拟 ,深入分析了动叶弯掠对级的性能以及叶排间气动干扰的影响。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;弯掠动叶下游的静叶前缘区域的顶部和根部的静压扰动幅值减小,中部的则有所增加,整个径向范围内扰动更为均匀;动叶弯掠后,由于弯掠动叶出口的损失分布的变化以及动叶尾迹和二次流在静叶流道中的输运和耗散特性的改变,静叶前缘区域以外的压力面和吸力面不同位置处的静压波动也发生了变化。
The unsteady flow field before and after buckling of moving blades under a single-stage transonic compressor design was numerically simulated. The performance of bucket-swept pair and the influence of aerodynamic interference between blades were analyzed. The results show that under unsteady conditions, the efficiency of the compressor after sweeping bucket leaves is still greatly improved, and the fluctuation amplitude of efficiency is obviously lower than that of the prototype compressor. Meanwhile, the efficiency and pressure ratio The amplitude of the static pressure disturbance at the top and the root of the leading edge of the vane downstream of the curved swept vane decreases while that in the middle increases and the disturbance in the whole radial range becomes more Even after the blade is swept, due to the change of the distribution of the loss at the outlet of the curved swept blade and the change of transport and dissipation characteristics of the rotor wake and the secondary flow in the stator vane flow channel, the pressure outside the front vane region Static pressure fluctuation at different positions of the surface and suction surface also changed.