| 李宁,陈林,林鸿洲,王献忠,叶曦.T型三通水管路噪声特性数值研究*[J].,2022,41(2):250-256 |
| T型三通水管路噪声特性数值研究* |
| Numerical study on noise characteristics of T-shaped three-way water pipeline |
| 投稿时间：2021-03-27 修订日期：2022-03-01 |
| 中文摘要: |
| 水管路系统工作运行中会产生较大的管路振动和流噪声。作为偶极子声源，充液管路内湍流激发的脉动压力会形成流噪声，且激励管壁产生流激振动噪声。为了揭示水管道系统的流激振动噪声与流噪声特性的区别，基于有限元方法对不同厚度的充液管路声学模态、结构模态以及耦合模态进行计算；基于计算流体力学联合声学边界元的混合计算方法探讨变流速下流噪声与管路声学特性之间的关系；并计算分析变流速下流噪声与流激振动噪声特性，变厚度下流激振动噪声特性；将变流速及变厚度管路的流噪声和流激振动噪声进行对比。结果表明：流噪声的峰值频率受管路声学模态的影响，随着流速的增加流噪声能量会增加但峰值频率不变；而流激振动噪声的峰值受管路耦合模态的影响，厚度增加导致模态变化，峰值频率改变；流噪声幅值要大于流激振动噪声幅值。 |
| 英文摘要: |
| In the operation of the water and pipeline system, there will be large vibration and flow noise. As a dipole sound source, the turbulent pulsating pressure in the liquid filling pipeline will form flow noise and stimulate the flow-excited noise on the pipe wall. In order to reveal the difference between the fluid-excited noise and the fluid noise characteristics of the water pipeline system, the acoustic modes, structural modes and coupling modes of the liquid-filled pipeline with different thickness are calculated based on the finite element method. The relationship between flow noise and pipeline acoustic characteristics is discussed based on hybrid calculation method of computational fluid dynamics and acoustic boundary element method. The characteristics of flow noise and flow-excited noise under variable flow velocity are calculated and analyzed, and the characteristics of flow-excited noise under variable thickness are calculated and analyzed. Compare flow noise with flow- excited noise of variable velocity and thickness. The results show that the peak frequency of the flow noise is affected by the acoustic mode of the pipeline, as the flow velocity increases, the flow noise energy will increase but the peak frequency remains the same；while the peak frequency of the flow-excited noise is affected by the coupled mode of the pipeline, When the thickness changes, the peak frequency changes; the amplitude of the flow noise is greater than the amplitude of the flow-excited noise. |
| DOI：10.11684/j.issn.1000-310X.2022.02.010 |
| 中文关键词: 充液管路 流噪声 流激振动噪声 混合计算法 |
| 英文关键词: liquid-filled pipeline flow noise fluid-excited noise hybrid method |
| 基金项目: |
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