Wear characterisation of movable guide vane in the nose region of worm shell based on Eulerian multiphase flow model and standard k-ε turbulence model

Abstract

There are many sand-laden rivers in the world. The wear distribution of the guide vane of the turbine in the sand-laden flow is uneven, and the wear of the guide vane in the nose region is the most serious. In order to reveal the influence of volute structure on the wear law of guide vane at the nose end, a three-dimensional water body model of the whole flow channel of the turbine in the sediment-laden power station was established. The Euler multiphase flow model and the standard k-ε turbulence model were used to simulate the whole flow channel of the turbine. According to the simulation results, the pressure, sediment velocity and sediment concentration of the guide vane in the nose area are analyzed, and the wear of the guide vane in the nose area of the sediment-laden power station after one year of operation is measured and compared. The results of this study can provide technical support for predicting the easy wear position of the guide vane in the nose area of the sediment-laden river turbine and studying the anti-abrasion countermeasures.