타이틀 |
Parametric studies of acoustic duct attenuation of perforated-plate-on-honeycomb absorber |
저자 |
Minoru WATANABE, Katsumi TAKEDA, Tadao TORISAKI |
Keyword |
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URL |
http://send.nal.go.jp/send/jpn/dlpdf.php3/naltm00603.pdf?id=NALTM0000603 |
보고서번호 |
NAL TM-603 |
발행년도 |
1989.2 |
출처 |
NAL (National Aerospace Laboratory of Japan) |
ABSTRACT |
Parametric studies of acoustic duct attenuation of perforated-plate-on-honey-comb absorbers were conducted using a flow duct facility with duct airflow Mach number from -0.6 to 0.6. Open area ratio of face sheets from 0.01 to 0.09 and core depth from 10 to 40 mm were tested with constant duct size of 200 mm. The influence of these parameters as well as duct airflow Mach number was discussed |