Numerical Simulation And Experimental Research Of Solid-liquid Pump

The solid-liquid two-phase centrifugal pump is widely used in dredging, metallurgy, chemical industry, water conservancy, construction and environmental protection industries. For the solid-liquid two-phase flow transporting, there exist two main problems: serious wear and tear, low efficiency, leading to short life and low reliability. Although many scholars have done research in this area, there are many problems to be solved due to the complexity of the internal flow. In order to reveal its internal law of the solid-liquid two-phase flow, a combination way of numerical simulation and experimental research was adopted in this paper. The geometric model of the solid-liquid centrifugal pump was build, and the computational fluid dynamics analysis software Fluent was applied to simulate the internal solid-liquid two-phase flow field. The solid-liquid concentration, speed and pressure changes and distribution in its internal flow field were researched ,as well as the impaction of different particle concentration and particle size on the properties of solid-liquid pumps. The solid-liquid two-phase centrifugal pump was optimized preliminarily based on the test results. Some optimizing measures of the solid-liquid pump were proposed, which provided the basis for the design and improvement of the solid-liquid two-phase pump.The main work is outlined as following:1. The research results and the status in solid-liquid two-phase pump of the domestic and foreign scholars were summarized.2.The 3D modeling software Pro/E was used to model the impeller and volute. After meshing in the Gambit, the models were imported into Fluent. The numerical simulation for the water and solid-liquid two-phase flow was carried out, and the results were analyzed.3. A test loopof the solid-liquid two-phase flow pump was designed and built. The solid-liquid two-phase flow transport experiments were carried out on the conditions of the different particle concentration and diameter. The important test data and results were obtained for the subsequent optimization of the solid-liquid pump.4. A comprehensive comparative analysis between the numerical results and the experimental data was made. Combining with the design and optimization results of the predecessors'in the solid-liquid pump, a preliminary optimization of the centrifugal pump had done by numerical simulation method. Some meaningful results were achieved. It was indicated that using numerical method to improve the performance of solid-liquid pump was feasible.