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International Journal of Fluid Mechanics Research

Erscheint 6 Ausgaben pro Jahr

ISSN Druckformat: 2152-5102

ISSN Online: 2152-5110

The Impact Factor measures the average number of citations received in a particular year by papers published in the journal during the two preceding years. 2017 Journal Citation Reports (Clarivate Analytics, 2018) IF: 1.1 To calculate the five year Impact Factor, citations are counted in 2017 to the previous five years and divided by the source items published in the previous five years. 2017 Journal Citation Reports (Clarivate Analytics, 2018) 5-Year IF: 1.3 The Eigenfactor score, developed by Jevin West and Carl Bergstrom at the University of Washington, is a rating of the total importance of a scientific journal. Journals are rated according to the number of incoming citations, with citations from highly ranked journals weighted to make a larger contribution to the eigenfactor than those from poorly ranked journals. Eigenfactor: 0.0002 The Journal Citation Indicator (JCI) is a single measurement of the field-normalized citation impact of journals in the Web of Science Core Collection across disciplines. The key words here are that the metric is normalized and cross-disciplinary. JCI: 0.33 SJR: 0.256 SNIP: 0.49 CiteScore™:: 2.4 H-Index: 23

Indexed in

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

Volumen 28, Ausgabe 3, 2001, 12 pages
DOI: 10.1615/InterJFluidMechRes.v28.i3.50
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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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