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中南大学学报(自然科学版)

Journal of Central South University

第47卷    第1期    总第257期    2016年1月

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文章编号:1672-7207(2016)01-0062-07
混流泵水动力噪声的数值预报方法
付建,王永生,靳栓宝

(海军工程大学动力工程学院,湖北武汉,430033)

摘 要: 为了准确预报分析混流泵的水动力噪声,首先结合边界元法和点源模型理论完成静止壁面流噪声和任意边界条件下旋转声源噪声的数值计算与结果校验;然后以某混流泵为对象利用大涡模拟方法得到泵固体壁面脉动压力分布,在此基础上分别计算混流泵静止部件和旋转部件的水动力噪声,最后对二者声场进行叠加即得到了混流泵总声场。研究结果表明:混流泵静止壁面脉动压力幅值最强位置在叶轮与导叶的相互作用区域;静止部件对应的噪声峰值频率主要在叶频、导叶通过频率以及二者的谐频处;在混流泵进口截面叶轮引起的噪声占主要成分,静止部件的贡献可以忽略。

 

关键词: 混流泵;水动力噪声;点源模型;边界元法;计算流体力学

Numerical predicting method for hydroacoustics of mixed-flow pump
FU Jian, WANG Yongsheng, JIN Shuanbao

College of Marine Power Engineering, Naval University of Engineering, Wuhan 430033, China

Abstract:In order to predict the hydroacoustics of mixed-flow pump accurately, the flow noise of stationary wall was calculated based on boundary element method (BEM) and the noise of rotating source was calculated based on point source model. The numerical result is well in agreement with the data from experiment or reference. After that the fluctuation pressure distribution of a mixed-flow pump was simulated using large eddy simulation (LES), and then the hydroacoustics of stationary component and rotating component of pump were analyzed on the condition that the pump noise was equal to the sum of two components noise. The results show that the biggest fluctuation pressure of stationary component is located in the blade-stator interaction area and the peak value of noise caused by stationary part is in BPF and stator passing frequency and their harmonics. The noise in mixed-flow pump inlet is mainly caused by impeller. The contribution of stationary component can be neglected.

 

Key words: mixed-flow pump; hydroacoustics; point source model; boundary element method (BEM); computational fluid dynamics (CFD)

中南大学学报(自然科学版)
  ISSN 1672-7207
CN 43-1426/N
ZDXZAC
中南大学学报(英文版)
  ISSN 2095-2899
CN 43-1516/TB
JCSTFT
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