水面无限平板下方球状爆炸气泡流场压力特性  

Characteristics of flow-field pressure of spherical explosion bubbles under an infinite plate floating on water

作　　者：刘巨斌[1] 李海涛[2] 王俊森[3] 

机构地区：[1]海军工程大学理学院,湖北武汉430033 [2]海军工程大学科研部,湖北武汉430033 [3]海军工程大学动力工程学院,湖北武汉430033

出　　处：《华中科技大学学报（自然科学版）》2013年第4期119-122,共4页Journal of Huazhong University of Science and Technology(Natural Science Edition)

基　　金：国家自然科学基金资助项目(51109216)

摘　　要：基于势流理论,利用球状气泡模型假设,通过布置点源、点偶极子和镜像边界来模拟气泡膨胀、上浮和刚性边界条件.采用虚拟黏性阻力来模拟气泡上浮过程中的能量损失.利用拉格朗日方程建立气泡运动方程.通过对不同爆炸工况下气泡运动及刚性边界处流场压力变化特性进行研究发现:一定爆距范围内,气泡运动会造成平板边界处出现绝对负压区;爆炸药量的增加或爆距的减少,均会造成流场低压区范围增大.The motion of an explosion bubble under infinite plate floating on water was studied by po- tential flow theory and spherical bubble hypothesis model. Point source, dipole and their mirrors were used to account for bubble expanding, migration and the effect of rigid surface. An artifical viscous resistance was used to simulate energy dissipation. Lagrange equations were established to describe vertical bubble motion. By use of the equations, the characteristics of explosion bubbles motion and flow-field pressure on rigid surface were analyzed. The results show that there exists an absolutely negative pressure zone on rigid surface when stand-off is relatively small. The more explosives or the less stand-off is, the larger negative pressure zone is.

关 键 词：气泡 水下爆炸 势流理论 流场 压力 平板 

分 类 号：U661.7[交通运输工程—船舶及航道工程]