Features of Nonlinear Sound Propagation in Vibrationally Excited Gases
Weakly nonlinear sound propagation in a gas where molecular vibrational relaxation takes place is studied. New equations which govern the sound in media where the irreversible relaxation may take place are derived and discussed. Their form depends on the regime of excitation of oscillatory degrees o...
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| Format: | Article |
| Language: | English |
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Institute of Fundamental Technological Research Polish Academy of Sciences
2013-09-01
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| Series: | Archives of Acoustics |
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| Online Access: | https://acoustics.ippt.pan.pl/index.php/aa/article/view/54 |
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| author | Anna PERELOMOVA Magdalena KUSMIREK |
| author_facet | Anna PERELOMOVA Magdalena KUSMIREK |
| author_sort | Anna PERELOMOVA |
| collection | DOAJ |
| description | Weakly nonlinear sound propagation in a gas where molecular vibrational relaxation takes place is studied. New equations which govern the sound in media where the irreversible relaxation may take place are derived and discussed. Their form depends on the regime of excitation of oscillatory degrees of freedom, equilibrium (reversible) or non-equilibrium (irreversible), and on the comparative frequency of the sound in relation to the inverse time of relaxation. Additional nonlinear terms increase standard nonlinearity of the high-frequency sound in the equilibrium regime of vibrational excitation and decrease otherwise. As for the nonlinearity of the low-frequency sound, the conclusions are opposite. Appearance of a non-oscillating additional part which is a linear function of the distance from the transducer is an unusual property of nonlinear distortions of harmonic at the transducer high-frequency sound. |
| format | Article |
| id | doaj-art-70723adccc1f46af88f219efcde2e012 |
| institution | DOAJ |
| issn | 0137-5075 2300-262X |
| language | English |
| publishDate | 2013-09-01 |
| publisher | Institute of Fundamental Technological Research Polish Academy of Sciences |
| record_format | Article |
| series | Archives of Acoustics |
| spelling | doaj-art-70723adccc1f46af88f219efcde2e0122025-08-20T02:39:15ZengInstitute of Fundamental Technological Research Polish Academy of SciencesArchives of Acoustics0137-50752300-262X2013-09-01383Features of Nonlinear Sound Propagation in Vibrationally Excited GasesAnna PERELOMOVA0Magdalena KUSMIREK1Gdansk University of Technology Faculty of Applied Physics and MathematicsShip Design and Research CenterWeakly nonlinear sound propagation in a gas where molecular vibrational relaxation takes place is studied. New equations which govern the sound in media where the irreversible relaxation may take place are derived and discussed. Their form depends on the regime of excitation of oscillatory degrees of freedom, equilibrium (reversible) or non-equilibrium (irreversible), and on the comparative frequency of the sound in relation to the inverse time of relaxation. Additional nonlinear terms increase standard nonlinearity of the high-frequency sound in the equilibrium regime of vibrational excitation and decrease otherwise. As for the nonlinearity of the low-frequency sound, the conclusions are opposite. Appearance of a non-oscillating additional part which is a linear function of the distance from the transducer is an unusual property of nonlinear distortions of harmonic at the transducer high-frequency sound.https://acoustics.ippt.pan.pl/index.php/aa/article/view/54nonlinear acousticsparameter of nonlinearitynon-equilibrium mediavibrationally excited gas |
| spellingShingle | Anna PERELOMOVA Magdalena KUSMIREK Features of Nonlinear Sound Propagation in Vibrationally Excited Gases Archives of Acoustics nonlinear acoustics parameter of nonlinearity non-equilibrium media vibrationally excited gas |
| title | Features of Nonlinear Sound Propagation in Vibrationally Excited Gases |
| title_full | Features of Nonlinear Sound Propagation in Vibrationally Excited Gases |
| title_fullStr | Features of Nonlinear Sound Propagation in Vibrationally Excited Gases |
| title_full_unstemmed | Features of Nonlinear Sound Propagation in Vibrationally Excited Gases |
| title_short | Features of Nonlinear Sound Propagation in Vibrationally Excited Gases |
| title_sort | features of nonlinear sound propagation in vibrationally excited gases |
| topic | nonlinear acoustics parameter of nonlinearity non-equilibrium media vibrationally excited gas |
| url | https://acoustics.ippt.pan.pl/index.php/aa/article/view/54 |
| work_keys_str_mv | AT annaperelomova featuresofnonlinearsoundpropagationinvibrationallyexcitedgases AT magdalenakusmirek featuresofnonlinearsoundpropagationinvibrationallyexcitedgases |