1993 年 13 巻 Supplement2 号 p. 95-98
The self induced flow oscillation occurs when an underexpanded sonic or supersonic jet impinges on an obstacle. The flow visualization using the shadowgraph method is carried out and compared with the numerical result connected with the flow field. The optical images are analyzed by the image processing system with a personal computer. The range of the oscillation as a function of the ratio of reservoir to ambient pressure is explained. The experimental results as concerns characteristic of the flow oscillation agree with the numerical calculation solved by the TVD method.