Abstract
Concerning center drive confined jet, it is known that recirculation zone appears when the flow ratio is small. In this study, oil film method is used to vizualize the recirculation zone to investigate the relation between the location of the exit of the nozzle and pressure distributions. It was found that the location of reattachment line of recirculation zone did not change so much against the flow ratio, however the separation line changed, and that the recirculation zone moved according to the location of the exit of the nozzle. Recirculaion zone was found to be influential with pressure distributions on the wall.
