流体机械2025，Vol.53Issue(8)：10-19,101,11.DOI:10.3969/j.issn.1005-0329.2025.08.002
闭式系统中离心泵流动噪声全流域数值模拟及试验研究
Full-domain numerical simulation and experimental study on flow noise of centrifugal pumps in closed-loop systems
摘要
Abstract
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.关键词
闭式循环系统/压力脉动/内场噪声/外场噪声/声振耦合Key words
closed-loop system/pressure pulsation/internal noise field/external noise field/vibroacoustic coupling分类
机械制造引用本文复制引用
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[J].流体机械,2025,53(8):10-19,101,11.基金项目
国家自然科学基金项目(52461047,52009050) （52461047,52009050）
中央引导地方科技发展资金项目(23ZYAQ0320) （23ZYAQ0320）
