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| 平均流风能采集器声共振增强的数值模拟 |
| Numerical Simulation of Acoustic Resonance in Average Flow Wind Collector |
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| DOI：10.16018/j.cnki.cn32-1650/n.202402003 |
| 中文关键词: 声共振 封闭侧支管 DDES 风能采集器 |
| 英文关键词: acoustic resonance closed side branch pipe DDES wind energy collector |
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| 中文摘要: |
| 平均流风能采集器利用声共振现象实现风能的采集。为了提高风能采集器的效率，应增强封闭管道侧支管的声共振。本文采用计算流体力学方法，使用ANSYS Fluent对封闭侧支管内的声共振进行数值模拟，湍流模型采用Realizable k-?延迟分离涡模型模拟了不同截面形状的管道对声共振的影响。模拟结果表明: 模拟可以准确地捕捉到发生声共振的流速范围；采用圆形截面管和方形截面管的等效直径方法预测声共振是可行的，且方形截面管的声共振压力脉动幅值比圆形截面管的声共振压力脉动幅值明显增大；主管道与分支管的夹角会对声共振产生显著影响，改变分支管的角度可以增强声共振，因此，有一定主管道与分支管夹角的方形截面管更有利于提高风能的收集效率。 |
| 英文摘要: |
| The average flow air energy collector uses acoustic resonance phenomenon to collect wind energy. In order to improve the efficiency of the wind energy collector, the acoustic resonance of the side branch pipe of the closed pipeline should be enhanced. In this paper, the Computational fluid dynamics method is adopted, and the acoustic resonance in the closed side branch pipe is numerically simulated by ANSYS Fluent. Turbulence model uses the Realizable k-ε delayed eddy simulation to simulate the influence of pipes with different cross-sectional shapes on acoustic resonance. Thesimulationresults show that the simulation can accurately capture the flow velocity range of acoustic resonance. The equivalent diameter method of circular cross-section tube and square cross-section tube is feasible to predict acoustic resonance. The amplitude of acoustic resonance pressure pulsation of square section tube is obviously larger than that of circular section tube. The angle between the main pipe and the branch pipe will have a significant impact on the acoustic resonance, and changing the angle of the branch pipe can enhance the acoustic resonance. Therefore, the square section pipe with a certain angle between the main pipe and the branch pipe is more conducive to improving the efficiency of wind energy collection. |
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