| 李冬梅.基于小孔喷注理论的复合式小孔消声器设计[J].装备环境工程,2020,17(6):7-10. LI Dong-mei.Design of Compound Small-hole Muffler Based on Small-hole Injection Theory[J].Equipment Environmental Engineering,2020,17(6):7-10. |
| 基于小孔喷注理论的复合式小孔消声器设计 |
| Design of Compound Small-hole Muffler Based on Small-hole Injection Theory |
| 投稿时间：2019-12-04 修订日期：2019-12-11 |
| DOI：10.7643/issn.1672-9242.2020.06.002 |
| 中文关键词: 声学 降噪 小孔喷注理论 消声器 |
| 英文关键词:acoustics noise reduction small-hole injection theory muffler |
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| 中文摘要: |
| 目的 降低某型飞机ECS系统空气散热器性能试验台管路产生的高温高速排气噪声。方法 依据小孔喷注控制噪声理论，设计由4层穿孔板吸声结构组成的复合式小孔消声器。结果 经试验测定，噪声声压级降低了35 dB(A)。结论 设计的消声器消除了由临界孔板产生的刺耳的高频阻塞噪声，降低了噪声总声压级。降噪效果明显，可为类似管路气流噪声的消声设计提供参考。 |
| 英文摘要: |
| The paper aims to reduce the high-temperature and high-speed exhaust noise generated by the air radiator performance test bench pipeline in the ECS system for a certain type of aircraft. According to the theory of small-hole injection control noise, a composite small-hole muffler composed of a 4-layer perforated sound absorption structure was designed. Through experimental measurement, the noise sound pressure was reduced by 35 dB(A). This design of muffler eliminates the high-frequency blocking noise generated by the critical orifice plate and reduces the total sound pressure level of the noise. It has significant effect of noise reduction and can provide a reference for reduction of airflow noise in similar pipelines. |
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