An Experimental Study on a Flow in Wall Attachment Fluidic Devices (2nd Report. Distributions of Velocity and Pressure)

In addition to so-called low pressure bubble, the vortex is observed at the active duct side of the splitter, as a result of messurement of velocity and pressure distributions in wall attachment fluidic devices. This vortex is due to the slow flow coming from inactive duct, which is separate at the top of sharp splitter. A large pressure gradient is observed around the vortex and the low pressure bubble. The form of center line of jet is modified by this vortex. The existence of the vortex by the side of splitter is of no advantage to wall attachment fluidic device, so it is perhaps more advantageous to use blunt splitter instead of sharp splitter.