Generation and Evolution of Cavitation Bubbles in Volume Alternate Cavitation (VAC)

Chinese Journal of Mechanical Engineering

Original Article

Fuzhu Li¹  Shangshuang Chen¹  Yun Wang¹  Shenwei Xue¹  Zhenying Xu¹  Kun Zhang¹  Chao Yu¹ 

[1]School of Mechanical Engineering, Jiangsu University, 212013, Zhenjiang, China

关键词: Cavitation generation method;    Volume alternate cavitation (VAC);    Generating mechanism;    Evolution law;    Computational fluid dynamics (CFD);    Cavitation flow visualization (CFV);   

DOI  :  10.1186/s10033-023-00890-w

 received in 2021-12-07, accepted in 2023-05-04,  发布年份 2023

来源: Springer

【 摘 要 】

Cavitation generation methods have been used in multifarious directions because of their diversity, and numerous studies and discussions have been conducted on cavitation generation methods. This study aims to explore the generating mechanism and evolution law of volume alternate cavitation (VAC). In the VAC, liquid water is placed in an airtight container with a variable volume. As the volume alternately changes, the liquid water inside the container continues to cavitate. Then, the mixture turbulence model and in-cylinder dynamic grid model are adopted to conduct computational fluid dynamics simulation of volume alternate cavitation. In the simulation, the cloud images at seven heights on the central axis are monitored, and the phenomenon and mechanism of height and eccentricity are analyzed in detail. By employing the cavitation flow visualization method, the generating mechanism and evolution law of cavitation are revealed. The synergistic effects of experiments and high-speed camera capturing confirm the correctness of the simulation results. In the experiment, the volume change stroke of the airtight container is set to 20 mm, the volume change frequency is 18 Hz, and the shooting frequency of the high-speed camera is set to 10000 FPS. The experimental results indicate that the position of the cavitation phenomenon has a reasonable law during the whole evolution cycle of the cavitation cloud. Also, the volume alternation cycle corresponds to the generation, development, and collapse stages of cavitation bubbles.

【 授权许可】

CC BY   
© The Author(s) 2023

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