I've been think about this area for a long time now and this is my latest thought:
- Add a ~2" cuff to the rear of the outlet to gently turn the air inward toward the centerline
- add a cernterline fairing consisting of two sections (forward an aft) that retains the full height of the outlet all the way to the trailing edge
- the fwd section of the center fairing would swell from a smoothly curved leading edge to the interface with the aft section.
- many aft sections could be built to test the effect of different shapes - the best would seem to be one that is "fat" at the front to restrict the outlet area then curve inward going slightly concave to pick up the bypass flow around the "Cuff" perhaps accellerate the aircoming past the forward part of the center fairing
- all three pieces would be independent but when installed all three would be interconnected with screws, platenuts and dimple washers.
Thoughts?
Bob Axsom
- Add a ~2" cuff to the rear of the outlet to gently turn the air inward toward the centerline
- add a cernterline fairing consisting of two sections (forward an aft) that retains the full height of the outlet all the way to the trailing edge
- the fwd section of the center fairing would swell from a smoothly curved leading edge to the interface with the aft section.
- many aft sections could be built to test the effect of different shapes - the best would seem to be one that is "fat" at the front to restrict the outlet area then curve inward going slightly concave to pick up the bypass flow around the "Cuff" perhaps accellerate the aircoming past the forward part of the center fairing
- all three pieces would be independent but when installed all three would be interconnected with screws, platenuts and dimple washers.
Thoughts?
Bob Axsom