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 3Page: Previous 1 2 3 4 5 6 7 8 9 10 11 12 13 NextLast modified: November 3, 2007