Optimized Reduction of Unsteady Radial Forces in a Singlechannel Pump for Wastewater Treatment

Kim, Jin‐Hyuk; Cho, Bo-Min; Choi, Young-Seok; Lee, Kyoung‐Yong; Peck, Jong-Hyeon; Kim, Seon-Chang

doi:10.1088/1755-1315/49/3/032008

Cited by 3 publications

(1 citation statement)

References 5 publications

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“…The rotating single-channel impeller and the volute domains are each constructed using approximately 1,300,000 and 1,200,000 grid points. Hence, the optimum grid system selected using the grid independency test has approximately 2,500,000 grid points, as previously reported [15,16].…”

Section: Steady and Unsteady Numerical Analysesmentioning

confidence: 83%

State-of-the-Art Design Technique of a Single-Channel Pump for Wastewater Treatment

Kim¹,

Choi²

2018

Wastewater and Water Quality

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A single-channel pump, which is commonly used for wastewater treatment, with a singlechannel impeller can effectively prevent performance reduction or damage caused by foreign substances. However, the design methods for this special type of pump are different and more difficult to realize than those for general pumps. In this chapter, a state-of-the-art design technique for a single-channel pump is introduced for realizing high efficiency and low-fluid-induced vibration. In other words, advanced multidisciplinary design optimization techniques combined with unsteady flow analysis are introduced and discussed in detail to simultaneously improve hydraulic efficiency and reduce flow-induced vibration, considering the impeller-volute interaction of a single-channel pump.

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Section: Steady and Unsteady Numerical Analysesmentioning

confidence: 83%

State-of-the-Art Design Technique of a Single-Channel Pump for Wastewater Treatment

Kim¹,

Choi²

2018

Wastewater and Water Quality

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Experimental Investigation of Unsteady Characteristics in a Single-Channel Pump

Tan

Feng

Liu

et al. 2019

Journal of Testing and Evaluation

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Single-channel pumps are a specific type of centrifugal pump that is widely used in the sewage treatment of raw wastewater and effluent pumping applications. In single-channel pumps, the rotor–stator interactions may generate unbalanced pressures that change during one impeller revolution. A specific experiment rig was constructed to investigate the unsteady characteristics synchronously, including energy performance, head pulsation, pressure pulsation, and radial force. It was found that the difference between the maximum and minimum head was greater than 5 m under all flow rates during a rotation period. With the increase of the flow rate, the head reached its minimum value slowly and achieved its maximum value more quickly. The static pressure distribution at the impeller outlet was the most uniform at 1.0Qd. The high-pressure region located initially downstream of the tongue gradually moved toward the upstream end of the tongue with an increase in the flow rate. When the blade outlet goes through the tongue, the pressure pulsation appears at its peak at the eighth cross section of the volute. The peak position moves toward the upstream with the rotation of the impeller. In the single-channel pumps, the absolute pressure pulsation achieved its peak at the blade passing frequency, and the pressure pulsation amplitude for fBPF varied gradually with an increase in the flow rate. The radial force reached a minimum value near the optimal efficiency point and its direction was mostly downstream of the tongue. To meet the hydraulic balance of the impeller, it was suggested that a balance piece be adapted to counteract the radial force.

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Simultaneous Optimization of Impeller and Volute of a Single-channel Pump for Wastewater Treatment

Kim

Choi

et al. 2019

IJFMS

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Optimized Reduction of Unsteady Radial Forces in a Singlechannel Pump for Wastewater Treatment

Cited by 3 publications

References 5 publications

State-of-the-Art Design Technique of a Single-Channel Pump for Wastewater Treatment

State-of-the-Art Design Technique of a Single-Channel Pump for Wastewater Treatment

Experimental Investigation of Unsteady Characteristics in a Single-Channel Pump

Simultaneous Optimization of Impeller and Volute of a Single-channel Pump for Wastewater Treatment

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