| 吴春明,温华兵,马正刚,刘红丹,申华.掠流作用及不同穿孔角度时共振腔消声器性能分析[J].声学技术,2023,42(2):242~247 |
| 掠流作用及不同穿孔角度时共振腔消声器性能分析 |
| Performance analysis of resonator muffler under grazing flow and different perforation angles |
| 投稿时间：2021-11-09 修订日期：2021-12-10 |
| DOI：10.16300/j.cnki.1000-3630.2023.02.018 |
| 中文关键词: 穿孔共振消声器 掠流 穿孔角度 马赫数 传递损失 |
| 英文关键词: perforated resonance muffler grazing flow perforation angle Mach number transmission loss |
| 基金项目: |
|
| 摘要点击次数: 227 |
| 全文下载次数: 255 |
| 中文摘要: |
| 采用数值方法研究了掠流及不同穿孔角度下共振消声器声学性能的影响。通过求解三维非定常、湍流和不可压缩线性Navier-Stokes方程，得到掠流马赫数对不同穿孔角度下消声器传递损失的影响规律。结果发现，穿孔角度越小的消声器在对应马赫数下的共振频率偏移量越少，马赫数从0.05增加至0.1时，原模型与同向穿孔45°、60°、75°、逆向穿孔45°的偏移量分别为12.3%、9.2%、12.3%、20.0%和7.5%，同时同向穿孔的消声器较原模型在共振频率处都有较大的消声量，表明在流动状态下，穿孔角度显著影响消声器的消声性能，且同向穿孔能有效降低流动对消声器的影响。 |
| 英文摘要: |
| In this paper, the effects of grazing flow and different perforation angles on the acoustic performance of resonance muffler are studied by numerical methods. By solving the three-dimensional unsteady, turbulent and incompressible linear Navier-Stokes equations, the influencing rule of Mach number of grazing flow on muffler transfer loss at different perforation angles is obtained. The results show that the muffler with smaller perforation angle has less resonance frequency offset at the corresponding Mach number. When the Mach number increases from 0.05 to 0.1, the resonance frequency offsets of the original muffler model and the models with perforation angles of 45°, 60°, 75° in the same direction and 45° in the opposite direction are 12.3%, 9.2%, 12.3%, 20.0% and 7.5%, respectively. At the same time, the muffler perforated in the same direction has large noise attenuation than the original model at the resonance frequency, which shows that in the flow state, the perforation angle significantly affects the muffler's noise attenuation performance, and the effect of the flow on the muffler can be effectively reduced by the perforation in the same direction. |
|
查看全文
查看/发表评论 下载PDF阅读器 |
| 关闭 |
|
|
|
