| 引用本文: | 张江涛,赛庆毅,严永辉.叶片穿孔直径对小型轴流风扇气动性能及噪声的影响(J/M/D/N,J:杂志，M：书，D：论文，N：报纸).期刊名称,2026，43（1）：123-131 |
| CHEN X. Adap tive slidingmode contr ol for discrete2ti me multi2inputmulti2 out put systems[ J ]. Aut omatica, 2006, 42(6): 4272-435 |
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| 摘要: |
| :目的 为了降低小型轴流风扇气动噪声,在叶片尾缘附近,设计出不同穿孔直径的叶片穿孔风扇,将原型风
扇与穿孔风扇进行对比,探究不同穿孔直径对风扇气动性能及噪声的影响。 方法 采用雷诺时均法(Reynolds
Average Navier-Stockes,RANS)对原型及改型风扇进行气动性能模拟,在稳态模拟的基础上使用大涡模拟(Large
Eddy Simulation,LES)耦合 FW-H 声学方程的方法对风扇噪声进行模拟计算;将 3D 打印出来的模型进行气动性能
和噪声试验,得到不同流量工况下的性能参数。 结果 将叶片进行穿孔处理可以诱导叶片表面气流的流动,改善叶
片表面压力分布,延缓边界层分离,抑制叶尖泄露涡强度;设计工况下穿孔直径为 2. 5 mm 的穿孔风扇性能最佳,可
增大静压 6. 2%,提升静压效率 5. 72%,降低风扇 A 声级 3. 6 dB;原型风扇和改型风扇噪声指向性均近似为“8”形,
不同穿孔直径的风扇降噪量不同,但都在风扇进出口方向降噪效果较好,在风扇径向方向降噪效果较差。 结论 在
叶片尾缘附近设置穿孔可以提升风扇性能,降低风扇噪声,但是叶片穿孔风扇并不是穿孔直径越大越好,只有选择
合适大小的孔径才可以提升风扇性能,降低风扇噪声。 |
| 关键词: 小型轴流风扇 气动噪声 叶片穿孔 大涡模拟 A 声级 |
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| Effect of Blade Perforation Diameter on Aerodynamic Performance and Noise of Small Axial Fans |
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ZHANG Jiangtao SAI Qingyi YAN Yonghui
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School of Energy and Power Engineering University of Shanghai for Science and Technology Shanghai 200093 China
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| Abstract: |
| Objective To reduce aerodynamic noise in small axial fans blades with different perforation diameters were
designed near the trailing edge. This study compares the prototype fan with perforated fans to investigate the effects of
perforation diameter on aerodynamic performance and noise of fans. Methods The Reynolds-Averaged Navier-Stokes
RANS method was used to simulate aerodynamic performance of both prototype and modified fans. On the basis of
steady-state simulations Large Eddy Simulation LES coupled with the Ffowcs Williams-Hawkings FW-H acoustic
equation was employed to simulate fan noise. Aerodynamic performance and noise tests were conducted on 3D-printed
models to obtain performance parameters under different flow conditions. Results Perforating the blade can induce airflow
on the blade surface improve blade surface pressure distribution delay boundary layer separation and suppress tip
leakage vortex intensity. Under design conditions the perforated fan with 2. 5 mm diameter showed optimal performance
static pressure increased by 6. 2% static pressure efficiency improved by 5. 72% and A-weighted sound level decreased
by 3. 6 dB. Both prototype and modified fans exhibited approximately figure-8 shaped noise directivity. Noise reduction
varied with perforation diameter. Superior noise reduction was observed in the fan inlet and outlet directions while lesser
reduction occurred radially. Conclusion Perforations near the trailing edge can improve fan performance and reduce noise. However larger perforation diameters do not necessarily yield better results only appropriately sized perforations
can enhance fan performance and reduce noise. |
| Key words: small axial flow fan aerodynamic noise blade perforation large eddy simulation A-weighted sound pressure
level |
