Acoustic Linear and Nonlinear Spectroscopy of Bubbles in Liquids
The results of theoretical and experimental researches of sound scattering and propagation of acoustic pulses in liquids with bubbles are presented. This paper considers nonlinear nonstationary oscillations of bubbles and nonstationary sound scattering by bubbles of different size distributed in liquid. It is shown that at small concentration of bubbles absorption, scattering and parameter of acoustic nonlinearity are connected by linear dependence to bubble concentration and at high concentration there is sharp nonlinear dependence to bubble concentration. Experiments was carried out in water with bubbles. Concentration of bubbles changed at regulation of a current of electrolytic generator of bubbles. It is shown that the task of determining the sizes and distribution of gas bubbles can be solved by acoustic spectroscopy methods with the application of scattering of acoustic pulses of different duration and frequency. Nonlinear effects, originated in propagating of a sound in a liquid with vapor-gas bubbles are investigated by theoretical and experimental methods. It is shown, that nonlinear parameter and sound absorption are sharply increased if there are phase transformations. Experimental researches of sound propagation in water with bubbles are conducted at temperatures from 20℃ up to 92℃. It is shown that the temperature dependence of sound attenuation and acoustic nonlinearity of water with vapor-gas bubbles has a sharp increasing at high temperature.
V.A.Bulanov I.V.Korskov
V.I.Ilichev Pacific Oceanological Institute,Far Eastern Branch of the Russian Academy of Sciences Russia,690041,Vladivostok,Baltiyskaya Street,43
国际会议
The 10th Western Pacific Acoustics Conference(第十届西太平洋声学会议WESPAC X)
北京
英文
1-8
2009-09-21（万方平台首次上网日期，不代表论文的发表时间）