Abstract
When a wall reattachment device with vents works with such a large resistance load as that is produced with a complete or nearcomplete blockage of the outlet, the switching level may be substantially affected to become different from that with a zero or small resistance load.
In some devices for practical use, the vents are wide and the splitter overlaps with the vents. With such a configurations the change of switching level may be quite small, but no high recovery pressure can be gained.
The purpose of this paper is to present some design techniques to provide the device with desirable characteristics, the recovery pressure as high as possible and the change of switching level as small as possible. In the first half of paper, the effects of load on the stability of a reattached jet flow pattern are investigated. Then, it is concluded that these are related to a turn-over-flow to the opposite from an active output passage due to load. In the latter half, from a standpoint that a primal flow field of reattached jet flow must not be disturbed by the turn-over-flow and then the level is not affected by a load, some design techniques for the desirable device are suggested.
