小型运动体高速倾斜入水空泡流动数值研究

doi:10.3969/j.issn.1000-1093.2019.02.013

兵工学报 ›› 2019, Vol. 40 ›› Issue (2): 334-344.doi: 10.3969/j.issn.1000-1093.2019.02.013

小型运动体高速倾斜入水空泡流动数值研究

陈晨，魏英杰，王聪

（哈尔滨工业大学航天学院，黑龙江哈尔滨 150001）

收稿日期:2018-03-26 修回日期:2018-03-26 上线日期:2019-04-08
作者简介:陈晨(1988—)，女，博士研究生。E-mail: chenchen19880112@163.com
基金资助:
国家自然科学基金项目(11672094)；黑龙江省自然科学基金项目(A201409)

Computational Analysis of Cavity Flow Induced by High-speed Oblique Water-entry of Axisymmetric Body

CHEN Chen, WEI Yingjie, WANG Cong

(School of Astronautics, Harbin Institute of Technology, Harbin 150001, Heilongjiang, China)

Received:2018-03-26 Revised:2018-03-26 Online:2019-04-08

摘要/Abstract

摘要： 为研究小型运动体高速倾斜入水时的空泡流动特性，采用求解雷诺时均Navier-Stokes方程的方法开展数值模拟。应用实验结果验证了数值方法的正确性。基于该方法对入水过程流体动力特性、流场结构特性与空泡发展进行分析，并研究了入水角度对入水流场的影响。研究结果表明：运动体在入水撞击阶段受到较大的阻力、升力和力矩，同时承受着极强的载荷；随着入水的深入，头部半球形高压区逐渐向头部中点移动，且空泡壁面的速度方向由指向水中向指向空泡内过渡；入水角度越小，撞击阶段阻力系数与砰击压力越小，入水后越容易发生弹道偏移，同时拉脱现象发生得越晚，入水空泡的最大尺寸越大。

关键词: 小型运动体, 高速倾斜入水, 空泡流动, 入水角度

Abstract: The characteristics of cavity flow around a small moving body under the high-speed oblique water-entry are analyzed, and the Reynolds-averaged Navier-Stokes equations are solved for simulation. The computational method is validated by comparing the simulated results with the experimental results. The characteristics of multiphase flow during water-entry and the influence of entry angle on water-entry flow field are investigated based on the computational method. The results show that the moving body is subjected to large drag, lift, moment and impact in the impact phase; the hemisphere-like high pressure area moves from the lower part of nose tip to the center of nose tip as the moving body continues to penetrate; the direction of velocity of cavity wall points to water first and then the cavity; the small entry angle causes small drag coefficient and impact in the impact phase and trajectory deflection; and the cavity is subsequently pulled away and the maximum size of the cavity is large when the moving body enters the water at a small entry angle. Key

Key words: axisymmetricbody, high-speedobliquewater-entry, cavityflow, entryangle

中图分类号:

TV131.3⁺2

陈晨，魏英杰，王聪. 小型运动体高速倾斜入水空泡流动数值研究[J]. 兵工学报, 2019, 40(2): 334-344.

CHEN Chen, WEI Yingjie, WANG Cong. Computational Analysis of Cavity Flow Induced by High-speed Oblique Water-entry of Axisymmetric Body[J]. Acta Armamentarii, 2019, 40(2): 334-344.

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第40卷
第2期2019 年2月兵工学报ACTA
ARMAMENTARIIVol.40No.2Feb.2019

小型运动体高速倾斜入水空泡流动数值研究

Computational Analysis of Cavity Flow Induced by High-speed Oblique Water-entry of Axisymmetric Body

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