噪声与振动控制

›› 2012, Vol. 32 ›› Issue (3): 113-117.DOI: 10.3969/j.issn.1006-1355.2012.03.026

• 2.振动理论与数值解法 • 上一篇    下一篇

封闭空间低频气流调制器喉道的声波特性

董明荣1,陈克安2,孙德玉,方厚林   

  1. （ 西北工业大学 航海学院环境工程系， 西安 710072 ）
  • 收稿日期:2011-10-13 修回日期:1900-01-01 出版日期:2012-06-18 发布日期:2012-06-18
  • 通讯作者: 董明荣

Acoustic Characteristics of the Throat of the Low-frequency Airflow Modulator within Closed Space

DONG Ming-rong，CHEN Ke-an，SUN De-yu，FANG Hou-lin   

  1. ( Department of Environmental Engineering, School of Marine Engineering, Northwestern Polytechnical University, Xi’an 710072, China )
  • Received:2011-10-13 Revised:1900-01-01 Online:2012-06-18 Published:2012-06-18
  • Contact: DONG Ming-Rong

摘要： 采用流体力学和声学相关原理，分析圆孔转动型气流调制器气室压力、喷口流量和喉道声波特性。理论计算与实验结果进行了对,并给出喉道声波的声压级随供气压力、供气流量和工作频率改变的变化规律。结果表明理论计算与实验结果基本符合，增大供气压力和流量可提高喉道声波强度。该分析方法对气流调制器设计有一定的指导意义。

关键词: 声学, 气流调制器, 喉道, 低频

Abstract: The gas chamber pressure, throat flow rate and the acoustic characteristics of an airflow modulator were analyzed by using the theory of fluid mechanics and aeroacoustics. The computation results are compared with the experimental results. The changes of the throat acoustic amplitude with gas supply pressure, gas supply flow rate and working frequencies were given. The results show that the computation results can agree with the experimental results, and the throat acoustic amplitude can be improved with the increase of the gas supply pressure and flow rate.

Key words: acoustics, airflow modulator, throat, low-frequency

中图分类号: