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在给定的限制条件下,通过从S2反问题计算出发,依靠在粗、细网格上求解三维黏性Navier-Stokes(N-S)方程的设计方法完成了某高负荷、跨声速低压风扇的气动设计.该设计方法抛弃了准三元设计对损失模型的依赖,较快的实现了跨声速风扇的气动设计.在设计结果的基础上,对风扇流场结构的分析表明,动叶顶部激波,以及激波、泄漏流和附面层的相互作用是风扇损失的主要来源.全三维的弯扭叶片设计实现了静叶的高亚声大折转角扩压流动.
Under given constraints, the aerodynamic design of a high-load, transonic low-pressure fan is accomplished by relying on the design of solving three-dimensional viscous Navier-Stokes (NS) equations on rough and fine meshes, starting from the S2 inverse problem. Design.The design method abandoned the quasi-ternary design's dependence on the loss model and realized the aerodynamic design of the transonic fan more quickly.On the basis of the design results, the analysis of the fan's flow field structure showed that the top of the rotor's shock wave , As well as the main source of fan loss due to the interaction of shock wave, leakage flow and surface coating.The full three-dimensional bending and twisting blade design achieves a high sub-large-angle diffusive flow of stator blades.