Experimental Investigation on Cavity Characteristics during Water Entry of Disc-Headed Vehicle Assisted by Gas Jet Flow

The trans-medium vehicle is expected to quickly and stably break the free liquid surface. In addition, there are some problems in the trans-medium process, such as the damage to structures and instruments caused by the high impact load, cavity collapse, and ballistic trajectory instability caused by...

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Bibliographic Details
Published in水下无人系统学报 Vol. 32; no. 3; pp. 489 - 495
Main Authors Zikun ZHEN, Zhihui ZOU, Yunhua JIANG
Format Journal Article
LanguageChinese
Published Science Press (China) 01.06.2024
Subjects
cavity
gas jet
trans-medium vehicle
water entry
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Summary:The trans-medium vehicle is expected to quickly and stably break the free liquid surface. In addition, there are some problems in the trans-medium process, such as the damage to structures and instruments caused by the high impact load, cavity collapse, and ballistic trajectory instability caused by complex unsteady multiphase flow. To address these issues, a forward jet flow was provided at the head of the vehicle to make the vehicle quickly and stably break the free liquid surface. The jet flow penetrated and changed the flow field structure of the free liquid surface to reduce the high impact load. To investigate the multiphase flow characteristics of the cavity during water entry of the disc-headed vehicle assisted by gas jet, the water entry experiment of the disc-headed vehicle assisted by forward jet flow was carried out. The cavity morphology formed during water entry was analyzed, as well as the formation and evolution process of the broken cavity in the case of a gas jet flow impinging on the liquid
ISSN:2096-3920
DOI:10.11993/j.issn.2096-3920.2024-0041