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Full‑domain numerical simulation and experimental study on flow noise of centrifugal pumps in closed‑loop systems
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Rong GUO1, 2, 3, Xuehan WANG1, Pengfei JIANG1, Rennian LI1, 2, 3
Fluid Machinery | 2025, 53(8) : 10 - 19
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Fluid Machinery | 2025, 53(8): 10-19
Full‑domain numerical simulation and experimental study on flow noise of centrifugal pumps in closed‑loop systems
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Rong GUO1, 2, 3, Xuehan WANG1, Pengfei JIANG1, Rennian LI1, 2, 3
Affiliations
  • 1College of Energy and Power Engineering，Lanzhou University of Technology，Lanzhou 730050，China
  • 2Gansu Provincial Key Laboratory of Fluid Machinery and Systems，Lanzhou 730050，China
  • 3Special Pump Valve and Flow Control System Key Laboratory of Ministry of Education，Lanzhou 730050，China
Published: 2025-08-30 doi: 10.3969/j.issn.1005-0329.2025.08.002
Outline
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To investigate flow noise characteristics of single‑stage single‑suction centrifugal pumps in closed‑loop systems，internal and external noise fields were simulated using acoustic finite element method and structural‑acoustic coupling based on unsteady flow calculations.Experiments were conducted on a closed‑loop pipeline system in a semi‑anechoic chamber.Results show that rotor‑stator interaction dominates pressure pulsation spectrum variations，with significant pulsation intensity at the impeller‑volute interface （especially the tongue region）.At design conditions，head and efficiency simulation errors are 3.07% and 2.79%，verifying model accuracy.In closed pipelines，sound wave reflection and superposition cause overall sound pressure level to first decrease then increase with flow rate：minimum 152.4 dB at design point，rising to 155.4 dB （0.65Qd） and 159.0 dB （1.175Qd） off‑design.Internal noise spectra are dominated by blade‑passing frequency （145.02 Hz） and harmonics，decreasing with higher frequencies.External low‑frequency noise（<1 000 Hz） is governed by impeller‑volute interactions，while high‑frequency noise （>1 000 Hz） is dominated by pipeline sources.This study provides references for pipeline optimization and vibration/noise reduction in closed systems.

closed‑loop system  /  pressure pulsation  /  internal noise field  /  external noise field  /  vibroacoustic coupling
郭荣, 王雪晗, 姜鹏飞, 李仁年. 闭式系统中离心泵流动噪声全流域数值模拟及试验研究. 流体机械, 2025 , 53 (8) : 10 -19 . DOI: 10.3969/j.issn.1005-0329.2025.08.002
Rong GUO, Xuehan WANG, Pengfei JIANG, Rennian LI. Full‑domain numerical simulation and experimental study on flow noise of centrifugal pumps in closed‑loop systems[J]. Fluid Machinery, 2025 , 53 (8) : 10 -19 . DOI: 10.3969/j.issn.1005-0329.2025.08.002
Appendix
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Year 2025 volume 53 Issue 8
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Article Info
doi: 10.3969/j.issn.1005-0329.2025.08.002
  • Receive Date：2025-01-27
  • Online Date：2026-10-20
  • Published：2025-08-30
Article Data
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History
  • Received：2025-01-27
  • Revised：2025-05-07
Affiliations
    1College of Energy and Power Engineering，Lanzhou University of Technology，Lanzhou 730050，China
    2Gansu Provincial Key Laboratory of Fluid Machinery and Systems，Lanzhou 730050，China
    3Special Pump Valve and Flow Control System Key Laboratory of Ministry of Education，Lanzhou 730050，China
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