Volume 39, Number 3, June 2021
|Page(s)||463 - 470|
|Published online||09 August 2021|
Numerical investigation on fluid dynamic characteristics around shoulder ventilation of submarine-launched vehicle
School of Marine Science and Technology, Northwestern Polytechnical University, Xi’an 710072, China
2 Key Laboratory of Unmanned Underwater Vehicle Technology, Northwestern Polytechnical University, Xi’an 710072, China
施瑶(1988-), 西北工业大学副研究员, 主要从事跨介质航体水动力特性研究。e-mail: firstname.lastname@example.org
In order to study the influence of the ventilating cavitation flow at the shoulder of a submerged-launched vehicle on the surface hydrodynamic characteristics, a three-dimensional potential model for the shoulder ventilation of the vehicle was established based on the homogeneous multiphase flow theory, standard RNG k-ε model, Singhal cavitation model and overlapping grid technology, and the numerical simulation of the unsteady evolution process of the ventilated cavitation flow was carried out, and the cavitation flow morphology evolution, surface pressure distribution and resistance characteristics under different ventilation rates were compared. The results showed that the thickness and length of the ventilated cavitation flow in the early stage of fusion continue increased with the increasing of ventilation volume, and its thickness and length changed slightly in the later stage; when the exhaust position did not change and the ventilation volume was within a certain range, the differential pressure resistance coefficient and viscous resistance coefficient decreased with the increasing of internal pressure of the ventilated cavity.
Key words: submarine-launched vehicle / ventilation mass flow / cavitation flow / hydrodynamics
关键字 : 潜射航行体 / 通气量 / 空泡流 / 流体动力
© 2021 Journal of Northwestern Polytechnical University. All rights reserved.
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