A Study in the Impeller-Volute Interactions of a Double-Suction Centrifugal Pump

Chung, Kyung-Nam; Park, Pyun-Gu; Kim, Jin‐Young

doi:10.1115/fedsm2003-45405

Cited by 1 publication

(1 citation statement)

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“…Xia et al [4] used the particular algorithm to study the special phenomena, which focused on tip clearance and captured leakage flow and secondary backflow in certain regions. Different from the former, Chung et al [5] investigated the other components, which include the impeller and volute, to quantify the interaction between them, which influences the intense fluctuation of pressure. It is noteworthy that the interaction is commonly found in centrifugal pumps, which results in unstable flow and noise.…”

Section: Introductionmentioning

confidence: 99%

Analysis of Inner Flow in a Multi-Stage Double-Suction Centrifugal Pump Using the Detached Eddy Simulation Method

et al. 2023

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In order to analyze the inner flow in a multi-stage double-suction centrifugal pump, which is regarded as a common way of knowing the current characteristics of the pump and as the basis of optimization for better performance, a numerical simulation considering the velocity field distribution characteristics and pressure fluctuation propagation law using the detached eddy simulation method was conducted. Additionally, the principle of entropy generation was put to use to quantify and compare the energy loss of different components. The results reveal that the existence of unstable flow structures in the first-stage impeller and a large number of vortical structures in the back-channel result in reduced operational efficiency of the pump. Furthermore, the pressure fluctuation intensity reaches its maximum with 0.15 at the blade trailing edge, which propagates to the tongue region of the forward flow channel and the double-volute under the low rates condition. Additionally, the main frequency of the monitoring points in the inter-stage flow channel and volute is basically located at a frequency of 198.667 Hz, which is twice the blade frequency. Consequently, the wall entropy production accounting for nearly 25% cannot be ignored and that the loss mainly occurs in the double-volute and the inter-stage flow channel due to the occurrence of irregular flow in the above components with more than 50%. The outcomes of this research present a valuable point of reference for the optimization of structural design in multistage turbomachines with various applications.

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Section: Introductionmentioning

confidence: 99%