Rolls-royce Deutschland Ltd & Co. Kg

Rene Spieweg

Marco Rose

Dimitrie Negulescu

Christian Mundt

The present invention relates to a nozzle with a nozzle surface area and a nozzle rim, on which first and second guiding devices are alternatingly provided in the circumferential direction, where the first guiding devices are of the nozzle-type design and the second guiding devices are of the diffuser-type design. The first guiding devices each have a first azimuthal guide wall and two wall elements, with the first azimuthal guide wall forming a first trailing edge and two first edges to the wall elements. The second guiding devices each have a second azimuthal guide wall and two wall elements, with the second azimuthal guide wail forming a second trailing edge and two second edges to the wall elements. A wall element connects a first guiding device and a second guiding device. The wall elements have a curved course in the axial direction.

Nozzle with guiding devices

A nozzle has a nozzle surface area and a nozzle rim, on which first and second guiding devices are alternatingly provided in the circumferential direction, where the first guiding devices are of the nozzle-type design and the second guiding devices are of the diffuser-type design. The first guiding devices each have a first azimuthal guide wall and two wall elements. The second guiding devices each have a second azimuthal guide wall and two wall elements. A wall element connects a first guiding device and a second guiding device. At least some of the first azimuthal guide walls of the first guiding device and at least some of the second azimuthal guide walls of the second guiding device have differing axial lengths, so that first and second trailing edges thereof have differing axial positions.

A nozzle includes first guiding elements () circumferentially arranged at a nozzle rim (). To reduce sound emission while keeping flow losses low, second guiding elements () are also circumferentially arranged at the nozzle rim (), with one of the first and second guiding elements () being diffuser-type and the other of the first and second guiding elements () being nozzle-type and with both types of guiding elements circumferentially alternating with each other.

Nozzle with guiding elements

A turboprop aircraft engine includes at least one outer air intake and at least one downstream inner duct system for the delivery of air to a compressor, and the inner duct system spirals around the center axis of the engine.

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Berlin, Germany

Rene Spieweg