摘要
最近的实验表明用侧壁小孔抽吸可在后台阶流中捕捉到静止的分离旋涡。笔者将用理论证明，二维后台阶流中存在自由旋涡的驻定态位置，并且有中性的驻定态稳定性。还进一步证明，用侧壁小孔抽吸。
The ability of the free vortex trapping is investigated downstream of a backward facing step in potential flow theory.It was found that there exits a stationary position of the free vortex downstream of the step,and the free vortex there is stable.More precisely,it is only neutral stable.To enhance the stability of the free vortex,the effects of the suction applied through the oriffice on side walls were examined.A linearized theory was developed to show that the stationary vortex becomes really stable if the suction is applied.
出处
《流体力学实验与测量》
EI
CSCD
1999年第3期21-24,共4页
Experiments and Measurements in Fluid Mechanics
基金
国防基金
关键词
分离旋涡
稳定性
不可压流
位流
自由旋涡
seperation vortex
stability
incompressible flow
potential flow
