For sure not Jumo004. It is about 2 feet across, and the Jumo004 part that is being suggested is about 1/4 the size.
My thought is that is the back end of the jet engine (?).
There were some BMW003 fan blade sections in the mix...but after looking at various walkaround photos, I cannot see this part either...
These were also parts from a Heinkel HeS 8 Jet engine...but not that either from what I can see...not too many photos of that around, due to rarity.
Mike