管道输油泵流体噪声模拟及泵噪声测试方法

发布时间：2018-05-15 02:23

本文选题：管道输油泵 + 离心泵　；参考：《排灌机械工程学报》2017年08期

【摘要】：为了分析输油泵的泵内部流体噪声及泵外部噪声的发生规律,对泵内流体声学的模拟方法以及泵噪声测试的试验方法进行研究.基于CFD/CA工具对声学数值模拟进行流场与声场间的耦合计算,对流动诱导噪声的声场传播规律进行求解,分析了回流或空化现象发生时的流动噪声声压级变化和频域特征.研究发现泵内未发生空化前,流动诱导噪声的频谱呈离散型,集中在低频区,并在高频时快速衰减,随着空化系数逐渐变小,叶轮与导叶之间的动静干涉作用成为泵内诱导噪声的主因.而试验测试是基于四端网络法,针对不同工况下的流动诱导噪声进行试验研究,发现泵噪声主要和泵流量有关,而泵机组噪声主要和泵运行工况有关.
[Abstract]:In order to analyze the internal fluid noise and the external noise of the pump, the simulation method of the fluid acoustics in the pump and the testing method of the pump noise are studied. The coupling calculation between flow field and sound field of acoustic numerical simulation is carried out based on CFD/CA tool. The sound field propagation law of flow-induced noise is solved, and the variation of sound pressure level and the characteristics of frequency domain of flowing noise when the phenomenon of backflow or cavitation occurs are analyzed. It is found that before cavitation occurs in the pump, the frequency spectrum of flow-induced noise is discrete, concentrated in the low-frequency region, and rapidly attenuates at high frequency, and decreases with the cavitation coefficient. The static and static interference between impeller and guide vane is the main cause of induced noise in pump. The test is based on the four-terminal network method. The results show that the pump noise is mainly related to the pump flow rate, while the pump unit noise is mainly related to the pump operating condition.
【作者单位】：江苏大学国家水泵及系统工程技术研究中心;
【基金】：江苏省重点研发计划项目(BE2015129,BE2016160) 江苏省产学研前瞻性联合研究项目(BY2016072-02) 江苏省自然科学基金资助项目(BK20130516) 江苏省普通高校研究生科研创新计划项目(KYLX16_0894)
【分类号】：TB53;TE974.1

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