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采用三维数值方法,对具有一定典型性的真实压气机级NASA stage 35进行研究,通过与文献中实验数据的对比,校核了商业CFD计算代码的可靠性,得到的性能曲线与实验数据有较好的一致性;通过对污垢沉积引起的叶片厚度和壁面粗糙度的增加来模拟不同的污垢沉积程度对压气机级性能的影响。结果表明,增加壁面粗糙度将显著降低压气机级等熵效率和总压比,喘点和堵点的流量均有所下降,对稳定工作范围影响不大;增加叶片厚度大幅降低堵点流量而对喘点流量影响较小,使得压气机级的稳定工作范围明显减小;动叶壁面粗糙度的增加相比静叶对级性能的影响明显要大。
The three-dimensional numerical method is used to study the real compressor stage NASA stage 35 with a certain typicality. By comparing with the experimental data in the literature, the reliability of the commercial CFD calculation code is checked, and the performance curve obtained is compared with the experimental data Good consistency; the effect of different degree of soil deposition on compressor stage performance was simulated by increasing the blade thickness and wall roughness caused by soil deposition. The results show that increasing the wall roughness will significantly reduce the compressor isentropic efficiency and the total pressure ratio, and the flow rates of the gas outburst point and the plugging point decrease, which have little effect on the stable working range. Increasing the thickness of the vane drastically reduces the flow of the plugging point The impact on the traffic flow is small, making the compressor stage of the stable working range was significantly reduced; rotor blade wall roughness increased compared to the vane on the performance of the class is significantly larger.