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A NUMERICAL ANALYSIS ON VISCO-THERMAL DISSIPATION OF RESONATOR NECKS 寺尾, 道仁 Terao, Michihito 関根, 秀久 Sekine, Hidehisa 文珠川, 潔 Monjugawa, Kiyoshi VISCO-THERMAL DISSIPATION BOUNDARY ELEMENT ANALYSIS RESONATOR NECKS NON-CIRCULAR APERTURES To investigate extrapolation of the Ingard's explicit representation [1] for acoustic dissipation around a circular aperture to a non-circular one, rigorous experiments were carried out. Consequently the dissipation given by the explicit representation became less than that of experiment as the aperture shape became apart from circular. To have more reliable estimation of the dissipations of non-circular apertures, a boundary element numerical approach for acoustic mode field along with the admittance representation of the visco-thermal boundary layer was introduced and their effectiveness was confirmed. Article 会議名称 : The 29th International Congress on Nose Control Engineering 主催学会 : SFA Societe Francaise d'Acoustique(SFA) 2000 eng conference paper VoR http://hdl.handle.net/10487/7907 https://kanagawa-u.repo.nii.ac.jp/records/3196 Proceedings INTER-NOISE 2000, August 27-30 2000, Nice-France 2000 4 2135 2138 https://kanagawa-u.repo.nii.ac.jp/record/3196/files/15 inter･noise200008.pdf application/pdf 410.7 kB 2018-11-16