Appeal No. 2003-0470
Application 09/671,870
circumstances, could reasonably be expected to be entrained
in or by the low pressure voids that would be located
immediately downstream of the turbine section blades (43).
As can be seen in the various embodiments of the noise
suppressor of Paulson, and from the description of the
operation thereof, e.g., in column 6, lines 36-59, the fan
section (42) compresses air entering the inlet (53) and
moving through the air flow passage (52), thereby providing
a compressed air flow downstream of the fan section which
forms a generally cylindrical column of compressed air
surrounding the jet exhaust downstream of the turbine
section (41). In our view, this cylindrical column of
compressed air surrounding the jet exhaust stream would
completely block any portion of the air flow from around the
tips of fan blades (50) from reaching the transient low
pressure voids that would be formed immediately downstream
of the turbine section blades (43). In this regard, we
agree with appellant’s arguments as set forth on pages 3-7
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