抄録
A new type of flow visualization technique with helium bubbles has been developed. The method is based on the ordinary helium bubble method which uses soap bubbles filled with helium gas. The bubbles are injected into the flow and the traces of bubbles are exposured twice for a proper interval. The velocity vectors can be calculated directly by measuring a distance between two traces of each bubble and the Period.
The separated flows around two-dimensional wing and three-dimensional concave body are visualized by the method. For the three-dimensional case locations of the traces of bubbles are calculated from two two-dimensional views by computer graphics techniques. The results show that the method gives useful information about the flow fields around two-dimensional and three-dimensional bodies.
