The inlet elbow pipe of a double-suction pump in solid–liquid two-phase flow can easily lead to a variety of unstable flow conditions, such as flow asymmetry, turbulence intensity, and vortex formation. Additionally, the inertia and aggregation effects of particle movement complicate this phenomenon further, significantly affecting energy performance and causing erosion damage. This study explores the relationship among elbow curvature, solid–liquid two-phase flow characteristics, entropy production distribution, and wear patterns in a double-suction centrifugal pump. The interaction between inlet vortex evolution and particle movements is elucidated, followed by an exploration of the spatial energy performance and erosion distribution within the double-suction pump. The results indicate that a rise in elbow curvature has a significant effect on the flow field, intensifying flow asymmetry, enhancing turbulence and vortex formation, which, in turn, leads to greater energy loss and entropy production rate, while diminishing pump efficiency. The influence of elbow curvature on energy loss is determined through the entropy production theory. In solid–liquid two-phase flow, the inertia and aggregation effects of the particles intensify wall friction and turbulent dissipation, resulting in a greater localized wear intensity. Under conditions with greater curvature, the effects of particle aggregation are enhanced, resulting in a more pronounced erosion intensity. This study offers a comprehensive insight into the pump performance in terms of the interplay of inlet vortex characteristics and the particle migration process.
Wang et al. (Tue,) studied this question.
Synapse has enriched 5 closely related papers on similar clinical questions. Consider them for comparative context: