单转子风扇的三维反问题气动设计
An Inverse Method for 3-D Aerodynamic Design of Fans and Pumps
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摘要: 采用准三维流函数反问题设计方法与三维 N-S求解方法的相互迭代对单转子风扇进行气动设计。在叶片初步计算中得到叶栅进出口气流角沿径向分布, 并将它作为本文的目标函数。采用准三维反问题求解方法, 依次构造出各个S1流面上的叶片几何形状和气流角分布。然后再采用 N-S方程的求解方法, 对叶片进行全三维流场的数值计算。通过 N-S方程计算结果与目标函数的对比, 重新修正叶片出口气流角分布, 并作为下一次反问题设计的目标函数。经过反问题与 N-S方程求解的反复迭代, 最终得到满足设计要求的叶型。Abstract: The method for 3 D design of fans or pumps in the present paper is presented which is based on the solutions of a quasi 3D inverse method and a 3D N S solver.At beginning the flow rate,the pressure ratio and the geometry of meridian pattern were given. The span height distributions of inlet and exit pitch wise averaged flow angles (or blade circulation) of the blade channel were obtained by the preliminary calculations.They are served to be the target parameters of the present calculation.Successively using a quasi 3D inverse method and a N S solver,a 3 D blade configuration can be obtained.As an example,an axial single rotor fan is shown.
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Key words:
- fan design /
- inverse problem /
- stream function /
- NS solution /
- aerothermodynamic of turbomachinery
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