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Nonlinear waveform distortion and shock formation in the near field of a continuous wave piston sourceстатья
Статья опубликована в высокорейтинговом журнале
Информация о цитировании статьи получена из
Web of Science,
Scopus
Статья опубликована в журнале из списка Web of Science и/или Scopus
Дата последнего поиска статьи во внешних источниках: 18 июля 2013 г.
- Авторы: Sapozhnikov O.A., Khokhlova V.A., Cathignol D.
- Журнал: Journal of the Acoustical Society of America
- Том: 115
- Номер: 5
- Год издания: 2004
- Издательство: Acoustical Society of America
- Местоположение издательства: United States
- Первая страница: 1982
- Последняя страница: 1987
- DOI: 10.1121/1.1695433
- Аннотация: A classical effect of nonlinear acoustics is that a plane sinusoidal acoustic wave propagating in a nonlinear medium transforms to a sawtooth wave with one shock per cycle. However, the waveform evolution can be quite different in the near field of a plane source due to diffraction. Previous numerical simulations of nonlinear acoustic waves in the near field of a circular piston source predict the development of two shocks per wave cycle [Khokhlova et al., J. Acoust. Soc. Am. 110, 95-108 (2001)]. Moreover, at some locations the peak pressure may be up to 4 times the source amplitude. The motivation of this work was to experimentally verify and further explain the phenomena of the nonlinear waveform distortion. Measurements were conducted in water with a 47-mm-diameter unfocused transducer, working at 1-MHz frequency. For pressure amplitudes higher than 0.5 MPa, two shocks per cycle were observed in the waveform beyond the last minimum of the fundamental harmonic amplitude. With the increase of the observation distance, these two shocks collided and formed one shock (per cycle), i.e., the waveform developed into the classical sawtooth wave. The experimental results were in a very good agreement with the modeling based on the Khokhlov-Zabolotskaya-Kuznetsov (KZK) equation. (C) 2004 Acoustical Society of America.
- Добавил в систему: Хохлова Вера Александровна
Прикрепленные файлы
| № | Имя | Описание | Имя файла | Размер | Добавлен |
|---|---|---|---|---|---|
| 1. | Полный текст | JASA_v115n5_2004_double_shock_experiment.pdf | 284,6 КБ | 22 ноября 2012 [oa.sapozhnikov] |