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叶轮叶片是复杂的空间曲面体,它直接影响到水泵的水力性能及运行稳定性.发动机水泵叶轮流动叠加设计是通过分析流体的流动规律,按其流动轨迹进行叶轮设计,将流体在离心水泵内的流动看作叶轮静止时的轴向和径向流动和叶轮旋转时的周向流动的叠加,从而用绕角流动和源环流的流体流动规律设计出叶轮的轴面轮廓和叶片骨线.通过CFD(Computational Fluid Dynamics)仿真,可以证明该方法从结构上避免了流体流动过程中由于空间的相对不均而造成的压力不均,减轻了回流、二次流,相应地减少能量的损失,提高水泵的效率.
Impeller blade is a complex space curved surface body, which directly affects the pump hydraulic performance and operational stability. Engine pump impeller flow superposition design is through the analysis of fluid flow law, according to the flow path of the impeller design, the fluid in the centrifugal pump As the superposition of the axial and radial flow at the stationary impeller and the circumferential flow when the impeller rotates so that the axial profile and blade line of the impeller can be designed by the fluid flow around the corner flow and the source circulation. The simulation of CFD (Computational Fluid Dynamics) proves that this method can avoid the structural pressure difference caused by the relative non-uniform space, reduce the backflow and secondary flow, reduce the energy loss and increase Pump efficiency.