Regulation of bubbles ascending speed o in water

Hydraulics

Ksenofontov, B.^1 ; Ivanov, M.^1 ; Chauhan, S.^2 ; Schaikhiev, I.^3

Bauman Moscow State Technical University, 5 Second Baumanskaya Street, Moscow

105005, Russia^1

Traffic Planning and Environment Division, Central Road Research Institute (CSIR), New Delhi, India^2

Kazan National Research Technological University, Kazan, Russia^3

关键词: Acoustic effects;    Acoustic impacts;    Ascent rate;    Bubble size;    Hydraulic properties;    Mechanical effects;    Photometric method;    Vibroacoustic effects;   

Others  :  https://iopscience.iop.org/article/10.1088/1757-899X/492/1/012023/pdf
DOI  :  10.1088/1757-899X/492/1/012023

来源: IOP

【 摘 要 】

The paper presents the result of the study of various methods of controlling the rate of ascent of air bubbles in water, such as the addition of surfactants, as well as the imposition of vibration. The ascent rate was estimated by the photometric method. It is shown that with increasing bubble sizes, an increase in the ascent rate is first observed, and then after reaching a maximum, the speed may begin to fall. This is due to the increase in resistance to the movement of the bubble due to the distortion of its shape. The additional imposition of vibroacoustic effects significantly improves the hydraulic properties of air bubbles as they ascend. It is shown that there is a vibration-acoustic effect and a mechanical effect of the piston on air bubbles and flotation complexes. The authors show that at the same time, a key role in the efficiency of the process of intensification of ascent is rendered by the time of acoustic impact.