국내 최대 기계 및 로봇 연구정보

기술보고서

기술보고서 게시판 내용
타이틀	Parametric studies of acoustic duct attenuation of perforated-plate-on-honeycomb absorber
저자	Minoru WATANABE, Katsumi TAKEDA, Tadao TORISAKI
Keyword
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