抄録
Impulsively started jet flow issuing from the metering orifice of the spool valves commonly used for hydraulic power applications are investigated by flow visualization test. A two-dimensional model of the spool valve is designed to visualize the jet flow by a hydrogen-bubble method. The images of flow fields taken by a CCD monochrome camera are fed into a microcomputer, and a digital image processing technique is employed to investigate the process of jet formation.
