In this study, a non-stirred Particle Image Velocimetry (PIV) testing device is developed to measure the flow field in a solid–liquid two-phase centrifugal pump. The pump casing and impeller are made of an organic glass material. Two types of impellers are designed considering different structure parameters. The performance curves of the pump are obtained for the different impellers at a rotating speed of 900 rpm with particle concentrations of 0%, 3%, 5%, and 10%. The flow fields for water and a solid–liquid two-phase mixture for the two impellers are measured utilizing the PIV system in a centrifugal rotating frame at the designed condition. The distribution of the particles, together with its influence on the performance of the different impellers, is analyzed. From a comparison of the relative velocity vector fields, the following can be concluded. First, the pump with a double arc-shaped profile demonstrated a more uniform and stable flow field distribution and higher performance than that with a single arc profile. Secondly, the solid particles were distributed mainly at the outlet of the impeller and volute wall, whereas the concentration distribution of the larger particles tended to match the pressure surface. This research can provide theoretical guidance for the design and optimization of two-phase flow centrifugal pumps.

在这项研究中，开发了一种非搅拌粒子图像测速 (PIV) 测试装置来测量固液两相离心泵中的流场。泵壳和叶轮由有机玻璃材料制成。考虑到不同的结构参数，设计了两种类型的叶轮。获得了不同叶轮在 900 rpm 转速下颗粒浓度为 0%、3%、5% 和 10% 时的泵性能曲线。在设计条件下，利用 PIV 系统在离心旋转框架中测量两个叶轮的水和固液两相混合物的流场。分析了颗粒的分布及其对不同叶轮性能的影响。从相对速度矢量场的比较来看，可以得出以下结论。首先，双弧形剖面泵比单弧形剖面泵表现出更均匀和稳定的流场分布和更高的性能。其次，固体颗粒主要分布在叶轮和蜗壳壁的出口处，而较大颗粒的浓度分布往往与压力面相匹配。该研究可为两相流离心泵的设计和优化提供理论指导。而较大颗粒的浓度分布往往与压力面相匹配。该研究可为两相流离心泵的设计和优化提供理论指导。而较大颗粒的浓度分布往往与压力面相匹配。该研究可为两相流离心泵的设计和优化提供理论指导。