Flight Crew Air Transport Pilot (ATP)
Aircraft Equipment Problem Less Severe
General Maintenance Action
Aircraft
On the descent passing through approximately 22;000 FT; the First Officer and I felt what seemed like wake turbulence.  The flight attendant felt it as well and called the flight deck to ask what it was; I informed her that it was turbulence and everything was OK.  The flight continued uneventfully to a normal landing.  Upon completing the post flight inspection; the First Officer found the top half of the right engine cowl was missing.
The Flight Crew of a CRJ-200 thought they had encountered wake turbulence during descent around 22;000 FT.  Upon inspection after landing; they discovered the top half of the right engine cowling was missing and presumed lost enroute.