This paper presents analyses and numerical calculations of a single bubble movement and its cavitation behav- ior where the influence of air diffusion,pressure fluctuation,relative velocity between the bubble and flui...This paper presents analyses and numerical calculations of a single bubble movement and its cavitation behav- ior where the influence of air diffusion,pressure fluctuation,relative velocity between the bubble and fluid and the growing bubble burst effect are considered.The calculational resuits provides rather detailed description of a single bubble movement and its cavitation behavior.展开更多
A nonlinear method for simulating two-dimensional cavity-flow interaction in high velocity flows is suggested. Mathematical model for the dynamics of unsteady cavity boundary and the motion of the outside flow is set ...A nonlinear method for simulating two-dimensional cavity-flow interaction in high velocity flows is suggested. Mathematical model for the dynamics of unsteady cavity boundary and the motion of the outside flow is set up, numerical and experimental investigations are made for the cavity flow past a two-dimensional bow- shaped body. The results show that because of the nonlinear effect, the trail of the cavity oscillates periodically, while the incipient point of the cavity almost remains fixed. Due to the unsteady oscilation of the cavity trail, the liquid pressure on the solid wall a little downstream of the reattachement point would rise sharply.展开更多
文摘This paper presents analyses and numerical calculations of a single bubble movement and its cavitation behav- ior where the influence of air diffusion,pressure fluctuation,relative velocity between the bubble and fluid and the growing bubble burst effect are considered.The calculational resuits provides rather detailed description of a single bubble movement and its cavitation behavior.
文摘A nonlinear method for simulating two-dimensional cavity-flow interaction in high velocity flows is suggested. Mathematical model for the dynamics of unsteady cavity boundary and the motion of the outside flow is set up, numerical and experimental investigations are made for the cavity flow past a two-dimensional bow- shaped body. The results show that because of the nonlinear effect, the trail of the cavity oscillates periodically, while the incipient point of the cavity almost remains fixed. Due to the unsteady oscilation of the cavity trail, the liquid pressure on the solid wall a little downstream of the reattachement point would rise sharply.
