Hi L337
I am not confident to assert anything about supersonics as my background is in low speed devices where IMD happened to be a critical directional stability issue, hence my interest in it. That said, re Concorde in the cruise, I too believe the supersonic outside air is decelerated through shocks by the intake to become subsonic by the time it gets to the rotating kit (much compression ensuing from this large drop in V thanks to Mr B)
So, I don’t see that the IMD component would be different from any high subsonic engine case, depending as it does on the force needed to deflect the mV of the airflow through 90 deg as it gets to the fan.
Cheers
JF
PS On a personal note do you feel threatened by the increasing use of composites?
JF