A study on the performance of the cavitating flow structure and load characteristics of the vehicle launched underwater

Shan Gao, Yao Shi, Guang Pan, Xiaobo Quan

科研成果: 期刊稿件文章同行评审

19 引用 (Scopus)

摘要

This paper analyzes cavitating flow structure and load characteristics of vehicles launched underwater for different cavitation numbers and different angles of attack. The improved delayed detached-eddy simulation model and volume of fluid, as well as overlapping mesh technique, are adopted. Additionally, a verification of the underwater launch simulation method and cavitation model is presented. Cavitating flow structure, wall vortex structures, and load characteristics are studied with a focus on the evolution mechanism of the cavitation flow field during the water-exit process. The results show that the attached cavitation rapidly collapses from top to bottom under the combined effect of large-medium density difference and reentry jet. Due to the presence of attachment cavitation, the development of the wall vortex structure represented by the hairpin vortex is inhibited. Considering the compressibility of the vapor phase, the peak of the synchronous collapse pressure is much larger than the collapse pressure with incompressibility. The pressure appears to be characterized by short widths and high peaks during the collapse of the water-exit. As the vehicle exits the water with a certain angle of attack, the range and peak of the cavitation collapse pressure rapidly reduce. In particular, the pressure side cavitation shedding and collapse behavior at the initial moment may lead to a larger pressure peak.

源语言英语
文章编号125108
期刊Physics of Fluids
34
12
DOI
出版状态已出版 - 1 12月 2022

指纹

探究 'A study on the performance of the cavitating flow structure and load characteristics of the vehicle launched underwater' 的科研主题。它们共同构成独一无二的指纹。

引用此