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基于Ωu=0的二元设计理论,用Fortran语言编程实现了高比转速混流泵叶轮的水力设计,讨论了轴面流道形状、速度矩分布规律、排挤系数对设计计算结果的影响。基于Navier-Stokes方程,在贴体坐标系和交错网格中,采用SIMPLEC算法,对依据不同设计参数设计出的2个叶轮内部流场进行了数值模拟,并将计算得到的流场压力分布和轴面速度分布进行了对比,同时对2个叶轮进行性能预估。结果表明,轴面流道形状和速度矩分布规律影响叶轮内部压力场和速度场的均匀性,导致2个叶轮性能预估值存在约2%的差别。
Based on the binary design theory of Ωu = 0, the hydraulic design of the high specific speed mixed flow impeller is realized by using the Fortran programming language. The influence of axial flow channel shape and velocity moment distribution and displacement coefficient on the design calculation results is discussed. Based on the Navier-Stokes equations, the SIMPLEC algorithm is used in the body coordinate system and the staggered grid to simulate the flow field in two impellers designed according to different design parameters. The calculated flow field pressure distribution and Axial velocity distribution are compared, while the two impeller performance prediction. The results show that the distribution of axial flow channel shape and velocity moment affects the uniformity of pressure field and velocity field inside the impeller, resulting in a difference of about 2% in the estimated performance of the two impellers.