Session: 06-15-01 Unsteady Hydrodynamics, Vibrations, Acoustics and Propulsion - I

Submission Number: 181585

Thermal Effects on Cavitation Bubbles Near a Rigid Wall 

In the field of polar marine and fluid sciences, cavitation bubble dynamics is a subject of significant interest due to its relevance in numerous engineering systems. The behavior of these bubbles is intrinsically coupled with the thermodynamic state of the surrounding liquid, where temperature stands out as a critical parameter. This work presents a systematic experimental investigation into the thermal effects on cavitation bubble dynamics near a rigid wall. Bubbles are generated by intense Joule heating at the prefabricated weak point in the low-voltage electric discharge circuit. A PMMA plate is placed below the bubble at a distance of 0.5-2.5 times the maximum bubble radius. The bubble morphology is captured by back illumination method using a high speed camera with a maximum rate of 1,000,000 frames per second. The water temperatures are precisely regulated by heaters from 10 to 90 °C. Our findings demonstrate that variations in temperature not only alter the morphological evolution characteristics of the bubble interface but also significantly influence the bubble collapse intensity, interfacial stability and the erosive potential on adjacent surfaces. The insights gained from this work aim to advance the fundamental understanding of cavitation erosion mechanisms in high temperature fluids from the perspective of single bubble dynamics.

Presenting Author: Shaocong Pei Harbin Engineering University

Presenting Author Biography: Shaocong Pei is a Ph.D. candidate at the College of Shipbuilding Engineering, Harbin Engineering University, China. His research focuses on the thermal effects on single-bubble dynamics and cavitation erosion mechanisms.

Authors:

Shaocong Pei Harbin Engineering University
Shuai Li Harbin Engineering University
Rui Han Harbin Engineering University