摘要
超空泡外形航行体优异的减阻性能有助于其在水下实现对目标的快速精准打击,头部喷气降载方法良好的缓冲降载效果可极大减小航行体高速入水过程受到的冲击破坏。因此,设计了几种兼具降载和减阻性能的头部喷气式超空泡跨介质航行体模型,并引入单向喷气与双向喷气模式。基于流体体积多相流模型,研究了头部喷气式超空泡航行体垂直入水过程的空泡、荷载及阻力特性,分析了喷气量对入水性能的影响。结果表明:头部喷气结合超空泡外形设计可降低航行体入水后的航行阻力,且双向喷气减阻效果更佳,因为双向喷气可以生成使航行体全程无沾湿的全包裹超空泡;头部喷气形成的空腔气垫既能显著降低轴向冲击加速度峰值,又能延迟峰值出现时间,从而降低航行体所受冲击荷载,这方面双向喷气表现也更好;随着喷气量的增加,双向喷气相对降载效率增速表现不佳。
The excellent drag reduction performance of the supercavitating shape of the vehicle is helpful to achieve a fast and accurate strike on the target underwater,and the good buffering and load reduction effect of a head jet load reduction method can greatly reduce the impact damage of the vehicle during high-speed water entry process.Therefore,several models of head-jet supercavitating trans-media vehicle with both load reduction and drag reduction performance were designed,and the one-way jet and two-way jet modes were introduced.Based on the volume of fluid multiphase flow model,the cavitation,load and resistance characteristics of the head jet supercavitation vehicle during the vertical water entry process were studied,and the influence of the jet volume on the water entry performance was analyzed.The results show that the design of the head jet combined with the supercavitation shape can reduce the navigation resistance of the vehicle after entering water,and the drag reduction effect of the two-way jet is better,because the two-way jet can generate a fully wrapped supercavitation that makes the whole process of the vehicle without wetting;the cavity air cushion formed by the head jet can not only significantly reduce the peak axial impact acceleration,but also delay the peak occurrence time,thereby reducing the impact load on the vehicle,and the two-way jet performance is also better in this regard.With the increase of the jet volume,the growth rate of the relative load reduction efficiency of the two-way jet is not good.
作者
彭睿哲
冯和英
向敏
侯杰
房玲
PENG Ruizhe;FENG Heying;XIANG Min;HOU Jie;FANG Ling(Hunan Provincial Key Laboratory of Mechanical Equipment Health Maintenance,Hunan University of Science and Technology,Xiangtan 411201,China;College of Aerospace Science and Engineering,National University of Defense Technology,Changsha 410073,China)
出处
《振动与冲击》
EI
CSCD
北大核心
2024年第20期238-246,共9页
Journal of Vibration and Shock
基金
国家自然科学基金(52176164)。
关键词
超空泡航行体
头部喷气
空泡特性
冲击荷载
阻力
supercavitating vehicle
head-jetting
cavity properties
impact load
resistance
