To study the influence of blade profiles of the plastic centrifugal pump on pump performance, the impeller blade profiles were designed and drawn by the single arc method, double arc method, logarithmic spiral method, and B-spline curve method, respectively, with the known structural parameters.The shape and size of four profiles were drawn, and two-dimensional models and three-dimensional models of four impellers and volute were completed, respectively. The impeller models were printed by 3D printing technology, and the performance experiments of the plastic centrifugal pump were carried out. The numerical simulation of the internal flow field was performed. From the contours of the velocity and pressure, the vapor volume fraction distribution, and fluid-structure interaction analysis of impellers, the impeller drawn by the logarithmic spiral method was better than others. The optimization of the logarithmic spiral method was completed. The impeller inlet and outlet diameters (D₁ and D₂) and impeller inlet and outlet installation angles (β₁ and β₂) were taken as control variables, and the total power loss and the minimum NPSH_r of the pump were taken as the objective functions. The optimization results were that D₁ = 58 mm and D₂ = 162 mm and β₁ = 17° and β₂ = 31°. The hydraulic efficiency was increased by 1.68%.

中文翻译：

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叶片轮廓对塑料离心泵性能的影响

为了研究塑料离心泵叶片轮廓对泵性能的影响，分别采用已知的单弧法，双弧法，对数螺旋法和B样条曲线法设计并绘制了叶轮叶片轮廓。绘制了四个轮廓的形状和大小，分别完成了四个叶轮和蜗壳的二维模型和三维模型。叶轮模型采用3D打印技术打印，并进行了塑料离心泵的性能实验。进行了内部流场的数值模拟。根据速度和压力的轮廓，蒸气体积分数分布以及叶轮的流固耦合分析，用对数螺旋法绘制的叶轮比其他的要好。对数螺旋法的优化已完成。叶轮入口和出口直径（d ₁和d ₂）和叶轮入口和出口安装角度（β ₁和β ₂）取作为控制变量，并且总的功率损耗和最小NPSH _ř泵的取作为目标函数。优化结果为d ₁  = 585毫米，d ₂  =162毫米和β ₁  = 17°，β ₂  = 31°。水力效率提高了1.68％。