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International Journal of Fluid Mechanics Research
ESCI SJR: 0.206 SNIP: 0.446 CiteScore™: 0.9

ISSN Druckformat: 2152-5102
ISSN Online: 2152-5110

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International Journal of Fluid Mechanics Research

DOI: 10.1615/InterJFluidMechRes.v28.i3.50
12 pages

Sound Radiation from an Open End of the Wedge-Shaped Waveguide. II. Analysis of the Numerical Results

V. T. Matsypura
National Engineering University of Ukraine "KPI", Kyiv, Ukraine

ABSTRAKT

The problem of sound radiation from an open end of a wedge-shaped waveguide is considered. The qualitative data about the structure and the energy characteristics of the sound field are presented. As the initial calculating relationships the formulas from [1] are used. Geometric peculiarity of the waveguides under consideration is that the walls are asymmetric with respect to the apex of the wedge. The additional elongation of one of walls is considered as a screen and is an important element in the mechanism of control over the near and the far field characteristics. Qualitative estimations of the effect of the screen length on an extent of a sound insulation in the zone of acoustical shadow is presented. The data about change of the sound pattern when the parameters of the waveguides are changed illustrate a complex structure of a radiated sound field and a strong dependence of one on the type of normal wave carrying energy to the edge of the wavegiude. Qualitative description of the far field structure is complemented by the data about a concentration factor of the sound energy and the distribution of an energy between the transmitted and reflected waves. It is shown that for any case the elongation of the screen the sound energy concentration can decrease.


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