Investigation of Cavitation Bubble Dynamics Considering Pressure Fluctuation Induced by Slap Forces

Xiaoyu Wang, Shenghao Zhou, Zumeng Shan and Mingang Yin
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Xiaoyu Wang: School of Mechanical Engineering and Automation, Northeastern University, Shenyang 110819, China
Shenghao Zhou: School of Mechanical Engineering and Automation, Northeastern University, Shenyang 110819, China
Zumeng Shan: School of Mechanical Engineering and Automation, Northeastern University, Shenyang 110819, China
Mingang Yin: School of Mechanical Engineering and Automation, Northeastern University, Shenyang 110819, China

Mathematics, 2021, vol. 9, issue 17, 1-10

Abstract: Cavitation erosion is induced by the penetrating pressure from implosion of cavitation bubbles nearby solid boundary. The bubble evolution and the subsequent collapse pressure are especially important to evaluate the erosion degradation of solid boundary materials. The bubble dynamics equation taking into account the influence of distance between bubble and solid boundary is formulated to investigate the effect of boundary wall on bubble evolution process. The pressure fluctuation induced by slapping forces is adopted to evaluate the bubble dynamic characteristics. Negative pressure period which reflects the effect of vibration velocity and gap clearance also has large influence on bubble dynamics. The effects of standoff distance, initial radius and negative pressure period on bubble evolution and collapsing shock pressure are discussed. Maximum bubble radius increases with standoff distance and initial radius, while shock pressure increases with distance and decreases with bubble initial radius, and both of them increase with negative pressure period.

Keywords: cavitation; slap forces; bubble dynamics; shock pressure; negative pressure period (search for similar items in EconPapers)
JEL-codes: C (search for similar items in EconPapers)
Date: 2021
References: View complete reference list from CitEc
Citations: View citations in EconPapers (2)

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