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Supervised by Ministry of Industry and Information Technology of The People''s Republic of China Sponsored by Harbin Institute of Technology Editor-in-chief Yu Zhou ISSNISSN 1005-9113 CNCN 23-1378/T

Related citation:Yuhang Gao,Xiaoze Du.Stability Mechanisms of Gas Bubbles Subject to Ultrasonic Field during the Rectified Diffusion in Liquids[J].Journal of Harbin Institute Of Technology(New Series),2019,26(1):68-76.DOI:10.11916/j.issn.1005-9113.18076.
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Stability Mechanisms of Gas Bubbles Subject to Ultrasonic Field during the Rectified Diffusion in Liquids
Yuhang Gao,Xiaoze Du
(Key Laboratory of Condition Monitoring and Control for Power Plant Equipment, Ministry of Education, School of Energy, Power and Mechanical Engineering, North China Electric Power University, Beijing 102206, China)
The spherical oscillation of a gas bubble in liquids is important to growth in liquids during rectified diffusions (e.g., the onset of the sonoluminescence and the enhancement of sonochemical reactions). The present paper numerically shows stability maps (divided into four zones), in which gas bubbles maintain the linearly spherical oscillation without nonlinear disturbance of rectified diffusions within a large range of bubble radius. The critical pressures of spherical and diffusional oscillations are two decisive indexes determining the stability status. Specifically, the stability boundaries and influential factors (including acoustic parameters and gas concentration in liquids) were discussed and analyzed. The results show that the variations of gas concentration and acoustic parameters dramatically changed the stable status of the gas bubbles. The gas bubble maintained stable status when external parameters and gas concentration were set between the two critical values properly. The cases of high-frequency and low-frequency limits were also introduced at the end of the whole paper.
Key words:  cavitation  gas bubble  gas concentration  rectified diffusion  spherical oscillation
Clc Number:CV131
Descriptions in Chinese:



(华北电力大学,电站设备状态监测与控制教育部重点实验室,北京 102206)