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回转体头部通气入水流场演化与载荷特性数值预报研究

王世晟 鲍文春 韩敬永 孙铁志 张桂勇

王世晟, 鲍文春, 韩敬永, 孙铁志, 张桂勇. 回转体头部通气入水流场演化与载荷特性数值预报研究[J]. 爆炸与冲击, 2022, 42(5): 053201. doi: 10.11883/bzycj-2021-0494
引用本文: 王世晟, 鲍文春, 韩敬永, 孙铁志, 张桂勇. 回转体头部通气入水流场演化与载荷特性数值预报研究[J]. 爆炸与冲击, 2022, 42(5): 053201. doi: 10.11883/bzycj-2021-0494
WANG Shisheng, BAO Wenchun, HAN Jingyong, SUN Tiezhi, ZHANG Guiyong. Numerical study on the flow field and load characteristics of a head-ventilated revolving body during water entry[J]. Explosion And Shock Waves, 2022, 42(5): 053201. doi: 10.11883/bzycj-2021-0494
Citation: WANG Shisheng, BAO Wenchun, HAN Jingyong, SUN Tiezhi, ZHANG Guiyong. Numerical study on the flow field and load characteristics of a head-ventilated revolving body during water entry[J]. Explosion And Shock Waves, 2022, 42(5): 053201. doi: 10.11883/bzycj-2021-0494

回转体头部通气入水流场演化与载荷特性数值预报研究

doi: 10.11883/bzycj-2021-0494
基金项目: 国家自然科学基金(52071062);辽宁省自然科学基金(2020MS106);中央高校基本科研业务费专项资金(DUT21LK25, DUT20TD108, DUT20LAB308);辽宁省兴辽英才计划(XLYC1908027)
详细信息
    作者简介:

    王世晟(1998- ),男,硕士研究生,wss980317@163.com

    通讯作者:

    孙铁志(1986- ),男,博士,副教授,suntiezhi@dlut.edu.cn

  • 中图分类号: O351.2

Numerical study on the flow field and load characteristics of a head-ventilated revolving body during water entry

  • 摘要: 为探究周向通气对回转体入水表面载荷的影响,基于VOF(volume of fluid)模型和Realizable k-ε两层湍流模型,开展了周向通气回转体低速入水流场演化数值预报和表面载荷特性分析。通过将数值预报的空泡形态与试验结果相对比,验证了所采用的数值方法的有效性,并分析了不同通气率对空泡形态、流场特性和表面载荷特性的影响。结果表明,通气会改变回转体入水空泡演化过程以及侧壁表面压力,在通气作用下空泡第一次脱落时间延缓,并且通气气体流向空化器后方负压区,改善了空化器后方的负压情况;其次,通气气体在通气口附近形成了明显的涡结构,之后与壁面处由空化器形成的涡融合,增强了空泡中部的涡流强度;最后,通气率越大,空泡闭合时间越晚,空泡体积越大,尾部空泡越不容易发生脱落,同时通气会减缓回转体表面的压力波动,通气率越大压力波动越小。综合分析可以认为,侧向通气对于回转体低速入水流场及表面载荷特性有一定的改善作用。
  • 图  1  回转体模型及尺寸

    Figure  1.  Revolving body model and dimensions

    图  2  计算域及网格设置

    Figure  2.  Computing domains and settings of mesh

    图  3  数值模拟得到的空泡形态与试验结果的对比

    Figure  3.  Comparison of cavity shape between numerical simulation and experiment

    图  4  CQS=0和CQS=0.5条件下空泡形态

    Figure  4.  Cavity shapes at CQS=0 and CQS=0.5

    图  5  t=10~40 ms时回转体侧壁表面相对压力

    Figure  5.  Relative pressure of revolving body at t=10~40 ms

    图  6  t=20~50 ms中截面速度场

    Figure  6.  Velocity field at t=20~50 ms

    图  7  t=20~50 ms时刻中截面Q

    Figure  7.  Value of Q at t=20~50 ms

    图  8  不同通气率下各相的分布

    Figure  8.  Phase distributions at different ventilation rates

    图  9  监测点P1、P2在不同通气率条件下的压力时间曲线

    Figure  9.  Pressure-time curves at point P1 and P2 at different ventilation rates

    表  1  空泡最大直径及长度

    Table  1.   Maximum diameter and length of cavity

    时间/ms空泡最大直径/mm空泡长度/mm
    CQS=0CQS=0.5CQS=0CQS=0.5
    1051.252.0 78.5 79.0
    2046.856.8102.3115.8
    3044.749.6129.0147.7
    4043.048.0130.0176.9
    5043.148.0118.3177.1
    6043.048.0121.3184.2
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出版历程
  • 收稿日期:  2021-11-25
  • 修回日期:  2022-01-25
  • 网络出版日期:  2022-05-05
  • 刊出日期:  2022-05-27

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