航空学报 > 2023, Vol. 44 Issue (21): 528450-528450   doi: 10.7527/S1000-6893.2022.28450

垂直发射条件下水下航行体通气云空泡的数值模拟与实验

任泽宇1, 王小刚1(), 程少华2, 权晓波2   

  1. 1.哈尔滨工业大学 航天学院,哈尔滨 150001
    2.北京宇航系统工程研究所,北京 100076
  • 收稿日期:2023-01-03 修回日期:2023-01-29 接受日期:2023-02-15 出版日期:2023-11-15 发布日期:2023-02-24
  • 通讯作者: 王小刚 E-mail:wangxiaogang@hit.edu.cn
  • 基金资助:
    国家自然科学基金(U20B2005)

Numerical simulation and experiment of ventilated cloud cavitation on underwater vehicle under vertical emission conditions

Zeyu REN1, Xiaogang WANG1(), Shaohua CHENG2, Xiaobo QUAN2   

  1. 1.School of Astronautics,Harbin Institute of Technology,Harbin 150001,China
    2.Beijing Institute of Aerospace Systems Engineering,Beijing 100076,China
  • Received:2023-01-03 Revised:2023-01-29 Accepted:2023-02-15 Online:2023-11-15 Published:2023-02-24
  • Contact: Xiaogang WANG E-mail:wangxiaogang@hit.edu.cn
  • Supported by:
    National Natural Science Foundation of China(U20B2005)

摘要:

针对垂直发射条件下通气云空泡的流动特性,以水下航行体为研究对象,采用改进型延迟分离涡模型(IDDES)进行非定常数值模拟,通过引入混合尺度加速了雷诺时均(RANS)到大涡模拟(LES)的转换计算,提高了湍流应力的计算精度;同时搭建了垂直约束式水下发射平台,采用定量排气的方式研究了通气云空泡的发展过程,验证了数值方法的有效性。研究发现:气液交界面在旋涡流动的作用下发生失稳,部分水相通过气液界面汇入通气空泡中发生气液掺混,形成云空泡;云空泡的发展为尺寸扩张和气液掺混同时进行的动态发展过程;在通气云空泡的作用下,流体速度梯度是云空泡影响涡量输运的主要作用因素。

关键词: 水下航行体, 垂直发射, 通气空泡, 云空泡, 涡量输运(IDDES)

Abstract:

To study the flow characteristics of the ventilated cloud cavitation under vertical emission conditions, an Improved Delayed Detached Eddy Simulation (IDDES) model is used to conduct non-constant numerical simulations with the underwater vehicle as the research object. The introduction of hybrid scale accelerates the Reynolds Average Navier-Stokes (RANS) to Large Eddy Simulation (LES) conversion calculation and improves the calculation accuracy of turbulent stresses. A vertically constrained underwater launch platform was built, and the development process of ventilated cloud cavitation was studied using the quantitative exhaust method, while the validity of the numerical method was verified. It was found that the gas-liquid interface was destabilized under the action of vortex flow. After that, part of the water phase converged through the gas-liquid interface into the ventilated cavitation, and gas-liquid mixing occurred to form cloud cavitation. The evolution of cloud cavitation is a dynamic development process, where size expansion and gas-liquid admixture are simultaneous.

Key words: underwater vehicle, ventilated cavitation, cloud cavitation, vortex transport, Improved Delayed Detached Eddy Simulation (IDDES)

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