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