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采用三维数值方法研究了污垢沉积对压气机动叶性能的影响.对具有一定典型性的真实压气机动叶NASA Rotor 37进行数值研究,通过与文献中实验数据的对比,校核了商业CFD(computational fluiddynamics)计算代码的可靠性,结果表明计算得到的性能曲线与实验数据有较好的一致性,应用于数值模拟手段是可行的.随后通过增加叶片和端壁的表面粗糙度和厚度来模拟不同的污垢沉积程度对压气机动叶性能的影响,结果表明:增加叶片厚度和表面粗糙度都将引起总压比和等熵效率降低;增加表面粗糙度将导致流量下降,稳定工况范围向小流量方向移动;而增加叶片厚度将使得稳定工况范围明显减小,堵点流量下降较显著,这将导致动叶工作特性恶化程度增大.
The effect of soil deposition on the performance of the compressor rotor blades was studied by three-dimensional numerical method.The numerical simulation of a typical typical rotor blade NASA Rotor 37 was carried out. Comparing with the experimental data in the literature, the commercial CFD (computational fluid dynamics) ) To calculate the reliability of the code.The results show that the calculated performance curve is in good agreement with the experimental data and it is feasible to apply the numerical simulation method.And then by simulating the different surface roughness and thickness of the blade and the end wall The results show that the increase of blade thickness and surface roughness will cause the decrease of the total pressure ratio and the isentropic efficiency. Increasing the surface roughness will lead to the decrease of flow rate, and the steady working range will shift to small flow direction Moving; while increasing the thickness of the blade will make the range of stable working conditions significantly reduced, and the flow of plugging point will drop more significantly, which will lead to the deterioration of operating characteristics of moving blades.