Investigation on inner flow quality assessment of centrifugal pump based on Euler head and entropy production analysis

• Published in: IOP conference series. Earth and environmental science Vol. 240; no. 9; pp. 92001 - 92008
• Main Authors: Qian, Bo, Chen, Jin-Ping, Wu, Peng, Wu, Da-zhuan, Yan, Peng, Li, Shi-yang
• Format: Journal Article
• Language: English
• Published: Bristol IOP Publishing 01.03.2019
• Subjects: Centrifugal pumps; Computational fluid dynamics; Energy dissipation; Energy distribution; Energy loss; Entropy; Flow stability; Fluid flow; Impellers; Mathematical models; Quality assessment; Quality control
• ISSN: 1755-1307; 1755-1315; 1755-1315
• DOI: 10.1088/1755-1315/240/9/092001

The quality of flow field inside centrifugal impeller is significant for the performance of centrifugal pump. The hydraulic performance and pump stability can be improved by means of optimizing the flow field. Numerical simulations are made to study the flow field using SST k-ω as turbulent model. In this study the inner flow quality of the model centrifugal pump is assessed in the light of energy distribution and entropy production. The Euler head is employed to measure energy of fluid obtained from impeller. The fluid energy obtaining process is characterized by Euler head distribution in streamwise location. The distribution uniformity of Euler head is also a measure to evaluate flow field quality which can be used to predict pump fluctuation performance. Meanwhile, entropy production analysis is also introduced to investigate the model pump in the study. The energy loss inside pump is denoted as entropy production and its distribution can be predicted based on numerical results. Analysis on entropy production can help provide basis for improving pump efficiency from another perspective.