Jim21
Topic Author
Posts: 2
Joined: Fri Feb 16, 2018 8:09 pm

Fan Hub Frame vs. IC vs Centerbody

Sat Nov 16, 2019 7:09 pm

I'm a bit confused on the LPC/Fan module of an engine. Are the fan hub frame, centerbody, and intermediate case the same thing? These are the big structure that's behind the fan that gives it a lot more structural
strength? Each OEM appears to use a different vernacular and I'm a bit confused. Looking at this from GKN, it looks like there is (typically) a fan hub frame & intermediate case.

https://www.gknaerospace.com/globalasse ... creen.pdf/


Thanks!
 
jetlife2
Posts: 198
Joined: Sun Jul 09, 2006 11:32 am

Re: Fan Hub Frame vs. IC vs Centerbody

Mon Nov 25, 2019 11:05 am

In GE we use the term Fan Hub Frame to mean the central structure excluding the OGVs and excluding the aft fan case. In the GKN attachment you provided, page 1 left picture, although I don;t think that is one of ours, the FHF would be the inner circular structure excluding the airfoils (OGVs) and excluding the outer case (aft fan case). Sometimes we might refer to this entire assembly as the Fan Frame but that is not precise.

We do not use the term Intermediate Case - we don't have IPCs.

We use the term Centerbody to refer to the cone that you see at the exhaust end of the engine. Not associated with fan structure.

Hope this helps.
My views are not necessarily the views of the GE Company
 
jetlife2
Posts: 198
Joined: Sun Jul 09, 2006 11:32 am

Re: Fan Hub Frame vs. IC vs Centerbody

Thu Dec 05, 2019 2:38 pm

Here is a great quick video using the GE9X as an example! Note: the FHF on this engine is HUGE.
https://twitter.com/generalelectric/sta ... 9112840192
My views are not necessarily the views of the GE Company

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