Effect of Solid-phase Concentration on Cavitation Performance of Deep-sea Mining Pump

doi:10.3901/JME.2019.08.201

Abstract

Abstract: In order to analyze the influence of solid concentration on the cavitation characteristics of deep-sea mining pump, the relationship between gas phase and liquid phase, solid phase and liquid phase are established through the theory of cavitation nucleus and the energy equation. And the effect of solid-phase parameters on the cavitation performance of deep-sea mining pump is studied. The cavitation steady simulation of slurry pump is carried out by fluent software using the mixture multiphase flow model, RNG k-ε turbulence model and Singhal fully cavitated model. The influence of different particle concentration on the pressure distribution, gas distribution and working performance of the slurry pump are given, which provides the theoretical basis for the cavitation characteristics of the slurry pump. The results show that the critical bubble radius and the solid concentration and the flow rate can be established by the liquid pressure when the cavitation occurs. The larger the solid phase particle concentration is, the larger the solid phase flow will occur. The anti-cavitation performance of pump will decrease. With the increase of solid concentration, the pressure decreases at the inlet of the impeller blade of the primary pump, as well as the volume fraction of the gas and the anti-cavitation performance.

Key words: cavitation, deep sea mining pump, numerical simulation, solid-phase concentration, theoretical analysis

CLC Number:

P744
TH313

XU Hailiang, XU Cong, ZENG Yicong, WU Bo. Effect of Solid-phase Concentration on Cavitation Performance of Deep-sea Mining Pump[J]. Journal of Mechanical Engineering, 2019, 55(8): 201-207.

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