Appeal No. 2003-0470
Application 09/671,870
As can be seen from appellant’s specification, an
arrangement for carrying out the above-noted method (e.g.,
Figure 3A) includes a flow mixing device which appellant has
characterized as “an unsteady flow ejector.” The unsteady
flow ejector (10) includes a multi-blade rotor (30) which is
disposed in a primary exhaust flow of the jet propulsion
engine and rotates in response to a transfer of momentum
from the engine core flow. The specification indicates that
rotation of the rotor (30) in the primary exhaust flow
generates a plurality of rotating high velocity, low density
jets (32) and a plurality of rotating low pressure voids
(34), with each of the voids being spaced between two of the
jets. An example of the rotor (30) is shown in Figure 2A of
the application drawings and includes a plurality of blades
(40) affixed to a hub (42). Appellant notes (specification,
page 7) that in the example shown, the rotor has four blades
(40), with the rotor face angle being about 60° and having
an open area ratio for the jets (32) of about 33%. The
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