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[期刊论文]

Start-up strategy of mixed-flow pump system with impulse operation

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author:

Ren, Z. (Ren, Z..) [1] | Sun, M. (Sun, M..) [2] | Zhang, J. (Zhang, J..) [3] | Unfold

Indexed by:

Scopus

Abstract:

The impact head, tip leakage vortex, and pressure pulsation during start-up can cause vibration and noise in the pump, and affect its hydraulic performance. The linear speed start-up method cannot solve the impact head and vibration problems. Therefore, in this study, a mixed-flow pump was investigated to explore the influence of different speed start-up schemes on the flow field and to optimize them. The rated speed was set to 1634 r/min, and numerical simulations of different start-up schemes were carried out using the standard k-ε model. Furthermore, the turbulent kinetic energy distribution of the inlet and outlet sections of the mixed-flow pump during different start-up schemes was provided. In addition, the normalized helicity and blade surface pressure for different start-up schemes were compared. Finally, an evaluation function was proposed to evaluate the stability of the flow field during start-up. The results showed that the evaluation function had four factors related to speed and acceleration during start-up. Factors α and γ were obtained based on the acceleration and speed at 0.2 s and 0.42 s during start-up, respectively. Factor β was affected by the time taken to reach the rated speed. Parameter δ was determined by the acceleration of the period before reaching the rated speed. Based on the evaluation function, a theoretical scientific selection of speed start-up scheme is proposed to improve the stability of the flow field in the pump during start-up. © 2023

Keyword:

Evaluation function Impact head Speed scheme Turbulent kinetic energy

Community:

  • [ 1 ] [Ren, Z.]School of Mechanical Engineering and Automation, Institute of Metal Rubber & Vibration Noise, Fuzhou University, Fuzhou, 350116, China
  • [ 2 ] [Sun, M.]School of Mechanical Engineering and Automation, Institute of Metal Rubber & Vibration Noise, Fuzhou University, Fuzhou, 350116, China
  • [ 3 ] [Sun, M.]Department of Energy and Power Engineering, Tsinghua University, Beijing, 100084, China
  • [ 4 ] [Zhang, J.]Department of Energy and Power Engineering, Tsinghua University, Beijing, 100084, China
  • [ 5 ] [Wang, X.]State Key Laboratory of Coastal and Offshore Engineering, Dalian University of Technology, Dalian, 116024, China
  • [ 6 ] [Huang, Z.]School of Naval Architecture and Ocean Engineering, Huazhong University of Science and Technology, Wuhan, 430074, China
  • [ 7 ] [Xu, J.]National Key Laboratory of Science and Technology on Vessel Integrated Power System, Naval University of Engineering, Wuhan, 430033, China
  • [ 8 ] [Huang, C.]College of Electric Engineering, Naval University of Engineering, Wuhan, 430033, China

Reprint 's Address:

  • [Huang, Z.]School of Naval Architecture and Ocean Engineering, China;;[Huang, C.]College of Electric Engineering, China

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Related Article:

Source :

Ocean Engineering

ISSN: 0029-8018

Year: 2023

Volume: 277

4 . 6

JCR@2023

4 . 6 0 0

JCR@2023

ESI HC Threshold:35

JCR Journal Grade:1

CAS Journal Grade:1

Cited Count:

WoS CC Cited Count:

30 Days PV: 0

Affiliated Colleges:

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