Jet nozzle system for a by-pass type gas turbine jet engine

摘要

1,020,018. Deflecting propulsive jets. JUNKERS FLUGZEUGUND MOTORENWERKE A.G. Aug. 13, 1963 [Aug. 16, 1962], No. 31907/63. Heading B7G. [Also in Division F1] In a by-pass type gas turbine jet engine the main gas flow and the by-pass air flow are discharged through separate nozzles for forward propulsion, deflecting means being provided whereby upon deflection to produce vertical lift or thrust reversal the main gas flow and the by-pass air flow discharge into a mixing chamber and thence through a common nozzle. The nozzle assembly is shown in Fig. 1 in the forward thrust position and in Fig. 2 in the vertical lift position. The flap member 7 in the Fig. position closes the outlet to the vertical lift nozzle 6 and the main gas stream discharges through the jet pipe 4 and nozzle 3a and the bypass air stream discharges through the duct 21 and annular nozzle 1b, the nozzle 1b being disposed forwardly of the nozzle 3a. In the Fig. 2 position, the downstream portion 3 of the jet pipe 4 is moved axially downstream and the flap 7 is moved about its pivotal point 8 to close off the flows to the nozzles 3a and 1b and to open the flow to the downwardly directed nozzle 6. The gas flow and the by-pass air flow now discharge into a common chamber 9 before discharging through the nozzle 6. The nozzle 6 may be shaped so as to provide reversed thrust for braking purposes.