摘要
为研究潜射航行体肩部通气空泡流对其表面流体动力特性的影响,基于均质多相流理论、标准RNG k-ε模型、Singhal空化模型以及重叠网格技术,建立三维潜射航行体肩部通气模型,开展通气非定常空泡流演变过程数值模拟研究,对比了不同通气量下空泡流形态演化、表面压力分布以及阻力特性。结果表明:当通气量增加到一定值后,通气空泡流在融合前期其厚度与长度不断增大,后期其厚度和长度基本保持不变;当排气位置不变、通气量在一定范围的条件下,通气空泡内压增大,压差阻力系数和黏性阻力系数呈减小趋势。
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-εmodel,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.
作者
高山
施瑶
潘光
GAO Shan;SHI Yao;PAN Guang(School of Marine Science and Technology, Northwestern Polytechnical University, Xi′an 710072, China;Key Laboratory of Unmanned Underwater Vehicle Technology, Northwestern Polytechnical University, Xi′an 710072, China)
出处
《西北工业大学学报》
EI
CAS
CSCD
北大核心
2021年第3期463-470,共8页
Journal of Northwestern Polytechnical University
基金
国家自然科学基金(51709229,51879220)
中央高校基本科研业务费310重大科技计划(3102019JC006)资助。
关键词
潜射航行体
通气量
空泡流
流体动力
submarine-launched vehicle
ventilation mass flow
cavitation flow
hydrodynamics
