A numerical analysis and high precision experiments of acoustic dissipation by viscothermal boundary^layer at a solid aslid surface

rights: 社団法人日本建築学会relation: isVersionOf:http://ci.nii.ac.jp/naid/11000415269

A NUMERICAL ANALYSIS ON VISCO-THERMAL DISSIPATION OF RESONATOR NECKS

To investigate extrapolation of the Ingard\u27s explicit representation [1] for acousticdissipation around a circular aperture to a non-circular one, rigorous experiments werecarried out. Consequently the dissipation given by the explicit representation becameless than that of experiment as the aperture shape became apart from circular. To havemore 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.会議名称 : The 29th International Congress on Nose Control Engineering主催学会 : SF