Originally Posted by
tdracer
You still have the vortices from the fan hitting that stator (basically the same noise generation mechanism as a siren - and we all know how quiet those are
) with no way to attenuate the sound.
Don't always assume that everybody else is stupid. There are 1.000 engineers presently working on this engine. Do you really think that not one of them has thought about the siren effect? If you look at current illustrations of this engine you can see that the rotor has a lager diameter than the stator. Your vortices will bypass the stator on the outside. RPM is much lower than a conventional fan, so blade separation is certainly something to worry about, but not more than with turboprop aircraft. For a recent picture see here:
https://aviationweek.com/shownews/du...view-milestone