Erosion and wear characteristics of submersible pumps for geothermal wells
In order to explore the influence of particle properties on the hydraulic characteristics and erosion wear of submersible pumps used in geothermal wells,a discrete phase model and RNG k-g tur-bulence model were used to conduct full-channel numerical simulation of the internal flow field inside a two-stage submersible pump.The results show that with the increase of solid particle volume fraction,the head and efficiency of each stage of the submersible pump show a downward trend,with a maxi-mum decrease of 1.68 m in single-stage head and 5.18％in single-stage efficiency.The erosion and wear of the impeller mainly occur at the inlet of the blade working surface.The erosion and wear of guide vanes mainly occur at the outlet of the guide vane working face and the front cover plate of the guide vane.As the density of solid particles increases,the average erosion rate of each component in-creases significantly.The maximum erosion rate of both the impeller and guide vanes increases with the increase of solid particle size,and the maximum erosion rate of the guide vanes varies more significant-ly with particle size compared to the impeller.When the particle size exceeds 0.650 mm,the maximum erosion wear rate of the flow passage components sharply increases.
submersible pumps for geothermal wellserosion modelparticle attributediscrete phase modelnumerical simulation
万方数据
维普
