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Application of Mach-Zehnder interferometer to measure irregular reflection of a spherically divergent N-wave from a plane surface in airстатья
Дата последнего поиска статьи во внешних источниках: 28 мая 2015 г.
- Авторы: Karzova M.M., Yuldashev P.V., Ollivier S., Khokhlova V.A., Blanc-Benon Ph
- Журнал: Journal of the Acoustical Society of America
- Том: 136
- Номер: 4
- Год издания: 2014
- Издательство: Acoustical Society of America
- Местоположение издательства: United States
- Первая страница: 2289
- Последняя страница: 2289
- DOI: 10.1121/1.4900277
- Аннотация: Mach stem is a well-known structure typically observed in the process of strong (acoustical Mach numbers greater than 0.4) step-shock waves reflection from a rigid boundary. However, this phenomenon has been much less studied for weak shocks in nonlinear acoustic fields where Mach numbers are in the range from 0.001 to 0.01 and pressure waveforms have more complicated temporal structure than step shocks. In this work, the results are reported for Mach stem formation observed in the experiment of N-wave reflections from a plane surface. Spherically divergent N-waves were generated by a spark source in air and were measured using a Mach-Zehnder interferometer. Pressure waveforms were reconstructed using the inverse Abel transform applied to the phase of the interferometer measurement signal. Temporal resolution of 0.4 μs was achieved. Regular and irregular types of reflection were observed. It was shown that the length of the Mach stem increased linearly while the N-wave propagated along the surface. In addition, preliminary results of the influence of surface roughness on the Mach stem formation will be presented. [Work supported by the President of Russia MK-5895.2013.2 grant, student stipend from the French Government, and by LabEx CeLyA ANR-10-LABX-60/ANR-11-IDEX-0007.]
- Добавил в систему: Хохлова Вера Александровна