A hybrid method is adopted for predicting flow induced noise within a centrifugal pump. The whole calculating domains are meshed with structured grids, and the inner flow analyses are accomplished with LES (Large Eddy Simulation) method, Smagorinsky model is selected as the sub-grid scale model. Flow induced noise is predicted based on simulating results of inner flow, the noise which generated by inlet and impeller are equivalently transformed to Lighthill surface, and volute is calculated as a direct acoustic source. Furthermore, the flow induced noise test bench is built up for test verification. The simulated results show that the blade pass frequency fblade is predominant frequency of flow-induced noise, but the shaft rotation frequency frotating and 2fblade cannot be neglected. The noise becomes more serious as the flow deviates from the best efficiency point. The maximum difference between simulated results and experimental data is less than 3dB. Hence, the hybrid method which based on LES and FEM (Finite Element Method) is an effective method to predict the flow induced noise in centrifugal pumps.
- Fluids Engineering Division
A Hybrid Method for Flow-Induced Noise in Centrifugal Pumps Based on LES and FEM
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Heng, Y, Yuan, S, Hong, F, Yuan, J, Si, Q, & Hu, B. "A Hybrid Method for Flow-Induced Noise in Centrifugal Pumps Based on LES and FEM." Proceedings of the ASME 2013 Fluids Engineering Division Summer Meeting. Volume 1B, Symposia: Fluid Machinery; Fluid Power; Fluid-Structure Interaction and Flow-Induced Noise in Industrial Applications; Flow Applications in Aerospace; Flow Manipulation and Active Control: Theory, Experiments and Implementation; Fundamental Issues and Perspectives in Fluid Mechanics. Incline Village, Nevada, USA. July 7–11, 2013. V01BT10A034. ASME. https://doi.org/10.1115/FEDSM2013-16594
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