空泡溃灭过程中力学损伤行为  

Dynamic impact behavior during bubble collapsing

作　　者：王国刚[1] 孙冬柏[1] 张秀丽[2] 俞宏英[1] 樊自栓[1] 孟惠民[1] 

机构地区：[1]北京科技大学材料科学与工程学院腐蚀防护中心,北京100083 [2]华北电力科学研究院有限责任公司,北京100045

出　　处：《北京科技大学学报》2007年第5期483-485,共3页Journal of University of Science and Technology Beijing

基　　金：国家"863"计划资助项目(No.2002AA331080);北京市重大科技项目(No.H024200050021)

摘　　要：在电脉冲空蚀实验装置上,设计加装了压电传感系统,成功地监测记录了空泡溃灭对金属表面的作用力,对气泡的溃灭过程进行了描述和解释,验证了气泡的二次溃灭理论.计算了两次溃灭过程中冲击能量变化情况.测量了气泡在距离金属表面不同距离时,空泡溃灭作用于金属表面压强和冲量的大小,两者的变化规律对比分析表明:脉冲放电产生的冲击压和冲量随距金属表面的不同距离而表现出的规律不一致.A new designed piezoelectricity sensor system was equipped to detect the impact pressure of collapsing cavitation bubbles induced by a spark-generated system for understanding the dynamic of collapsing bubbles on metal surface. The bubble collapsing process was described and analyzed, and the second bubble collapse theory was verified. The dynamic energy of the two stages of bubble collapse was given. More important, the impact pressure and the impulse were determined and calculated at different distances between the collapsing bubble and the metal surface, and the two characteristics were compared.

关 键 词：空蚀 空泡溃灭 材料损伤 压电传感 空蚀机理 

分 类 号：TG172.9[金属学及工艺—金属表面处理] TV131.2[金属学及工艺—金属学]