Turbofan engine and a method for exhausting breather air of an oil separator in a turbofan engine
AssigneeRolls-Royce Deutschland Ltd & Co KG
InventorsJuergen Beier, Markus Blumrich
Life of this patent
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Abstract
A turbofan engine that comprises a primary flow channel inside of which a primary flow flows through a gas generator during operation, a secondary flow channel inside of which a secondary flow is guided past the gas generator during operation, and an oil separator of a lube oil system that has a pipeline for exhausting breather air, wherein the pipeline forms a pipeline end. It is provided that the pipeline end is arranged inside the secondary flow channel, and is provided and configured for the purpose of discharging breather air directly from the pipeline end into the secondary flow channel.
Claims17
A turbofan engine, comprising:
- a primary flow channel extending through a gas generator wherein a primary flow flows through the gas generator via the primary flow channel during operation of the turbofan engine;
- a secondary flow channel for guiding a secondary flow past the gas generator during the operation of the turbofan engine;
- an oil separator of a lube oil system, wherein the oil separator includes a pipeline for discharging breather air;
- a pipeline end formed from a portion of the pipeline at an axially downstream end section of the pipeline;
- a strut arranged in the secondary flow channel;
- wherein the pipeline extends at least partially inside the strut, and wherein the pipeline end protrudes from an axially downstream end of the strut in a direction of the secondary flow and opens directly to the secondary flow channel, discharging breather air directly from the pipeline end into the secondary flow channel;
- wherein the pipeline end extends from the pipeline in a direction parallel to the direction of the secondary flow inside the secondary flow channel to discharge the breather air in the direction parallel to the direction of the secondary flow;
- and
- wherein the pipeline end is arranged inside the secondary flow channel in a downstream 20% of an axial length of the secondary flow channel.
A method for exhausting breather air of an oil separator in a turbofan engine, comprising:
- providing:
- a primary flow channel extending through a gas generator wherein a primary flow flows through the gas generator via the primary flow channel during operation of the turbofan engine;
- a secondary flow channel for guiding a secondary flow past the gas generator during the operation of the turbofan engine;
- an oil separator of a lube oil system, wherein the oil separator includes a pipeline for discharging breather air;
- a pipeline end formed from a portion of the pipeline at an axially downstream end section of the pipeline;
- a strut arranged in the secondary flow channel;
- wherein the pipeline extends at least partially inside the strut, and wherein the pipeline end protrudes from an axially downstream end of the strut in a direction of the secondary flow and opens directly to the secondary flow channel, discharging breather air directly from the pipeline end into the secondary flow channel;
- wherein the pipeline end extends from the pipeline in a direction parallel to the direction of the secondary flow inside the secondary flow channel to discharge the breather air in the direction parallel to the direction of the secondary flow;
- and
- wherein the pipeline end is arranged inside the secondary flow channel in a downstream 20% of an axial length of the secondary flow channel;
- and
- discharging the breather air into the secondary flow channel in the downstream 20% of the axial length of the secondary flow channel.
Dependencies are inferred from the claim text.