Jet engine air intake
Tried to search the subject before, but couldn't find any thread that really answered my question. It is relative simple, maybe better suited in the Engineers section, but I give it a try!!
Assuming subsonic aeroplanes, as far as I've read through litterature the engine intake is "usually designed divergent" to allow for reduced velocity at the compreesor face. Is this generally the design, on let's say a CFM56 or JT9? Being up in Victorville the other day, having the possibility to drool over some fancy aircraft compared to my Duchess, I couldn't say the intake looked divergent to me on A320, MD80, B737.
Anyone knows, from testing or calculation, what is a typical velocity the air enters the compressor face?? I seem to recall from my ATPL-theory M0.5, but are modern engines with VIGV able to cope with higher velocities than that? Is there any advantage/disadvantage with having high/low velocity to the compressor, considering ram pressure recovery perhaps?
Thanks in advance!!