水中爆炸气泡与水底边界相互作用的水射流现象

汪斌; 张远平; 王彦平

doi:10.11883/1001-1455(2011)03-0250-06

水中爆炸气泡与水底边界相互作用的水射流现象

doi: 10.11883/1001-1455(2011)03-0250-06

1.
中国工程物理研究院流体物理研究所冲击波物理与爆轰物理国防科技重点实验室,四川绵阳621900

基金项目:

国家重点基础研究发展计划(973计划)项目(51335010202)

中国工程物理研究院面上基金项目(20060101)

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出版历程
- 刊出日期: 2011-05-25

Waterjetphenomenainducedbytheinteractionbetween underwaterexplosionbubblesandwaterbottomboundaries

1.
NationalKeyLaboratoryofShock WaveandDetonationPhysics,InstituteofFluidPhysics,

Funds:

NationalBasicResearchProgramofChina(973Program)(51335010202)

More Information

Corresponding author: WANG Bin

摘要

摘要: 应用开尔文冲量原理,分析了水中爆炸产生的气泡与水底边界相互作用产生水射流的主要影响因素,开展了气泡与水平放置的钢板相互作用水射流现象的实验研究工作。通过改变炸药到钢板的距离,得到不同爆距条件下,气泡与钢板相互作用形成水射流的动态过程图像和气泡2次脉动压力。理论分析和实验结果均表明:随着爆距的减小,Bjerknes力迅速增加,气泡与水平放置钢板相互作用产生水射流的临界条件为爆距小于气泡最大半径。水射流具有非常明显的方向性,对目标毁伤作用明显。
- 爆炸力学 /
- 水射流 /
- 气泡脉动\水中爆炸 /
- Bjerknes力
Abstract: TheKelvinimpulseprinciplewasappliedtoanalyzethemajorinfluencefactorsintheformationofthewaterjetbytheinteractionbetweenanunderw terexplosionbubbleandawaterbottom boundary.Andaseriesofexperimentswereconductedinawatertanktoinvestigatethewaterjet phenomenainducedbytheinteractionbetweenbubblesandahorizontallyplacedsteelplate.Thedistancebetweentheexplosiveandthesteelplatewaschangedwiththedifferentexperimentalconditions. Theoscillationpicturesofthewaterjetswerecapturedbyahigh-speedcameraandthepulse pressuresofthebubbleswereobtainedbypressuresensorsatthepositionswiththedifferentdistances awayfromtheexplosionsource.Boththetheoreticalanalysisandtheexperimentalresultsshowthat theBjerknesforceincreasesmarkedlywiththedecreasingdistancebetweentheexplosiveandthesteel plate,andthecriticalcondition,fortheformationofthewaterjetbytheinteractionbetweenthebubbleandthehorizontallyplacedsteelplate, isthattheexplosiondistanceisshorterthanthemaximum bubbleradius.Andthewaterjethasadistinctorientationanditcanremarkablydamagethetarget.
- mechanicsofexplosion /
- waterjet /
- bubbleoscillation /
- underwaterexplosion