摘要
从湍流的近壁拟序结构对近壁区小粒径空泡的运动规律的影响出发,对空泡产生的机理做了新的探讨。从理论上推导出基于典型湍流边界层模式的非拟序结构下空泡的近壁区运动方程,并导出基于湍流近壁拟序结构作用的空泡近壁区运动方程。两种不同条件下的运动方程比较表明,湍流近壁区的拟序结构对空泡的产生具有决定性的意义,正是由于拟序猝发作用的存在,才使得空泡对壁面的空蚀作用得以发生。
Starting with the influence on the movement rules of small cavities,the mechanisms of emerging a single spherical bubble are study from the aspect of the turbulent coherent structure near the wall. A dynamic equation is established for the bubble and single spherical sand under the non-turbulent coherent structure near the wall, and then under the turbulent coherent structure near the wall. Through comparison, it can be seen that the turbulent coherent structure near the wall influences directly the cavitation of the bubble.
出处
《水科学进展》
EI
CAS
CSCD
北大核心
2004年第3期291-295,共5页
Advances in Water Science
关键词
拟序结构
空泡
湍流
近壁区
运动规律
coherent structure
spherical bubble
turbulent
near wall
movement rules
