Methods of Creating Fluidic Barriers In Turbine Engines

摘要

Methods are provided for creating a fluidic barrier between the core stream and the bypass stream in a turbofan engine. A method comprises compressing the bypass and core streams with a fan between an upstream splitter and a downstream splitter which divides the bypass and core streams, and imparting a first momentum into the air stream proximate the fan in a region between the core and bypass streams and the upstream and downstream splitters to form a fluid barrier, wherein the first momentum of the air stream in the region is higher than a second momentum of the air stream adjacent the fluid barrier.

主权项

1. A method of preventing pressure leakage from a core stream in a high bypass turbojet engine, comprising:
dividing an ambient air stream into a bypass stream and a core stream with a upstream splitter; compressing the bypass and core streams with a fan, said fan between the upstream splitter and a downstream splitter dividing the bypass and core streams downstream of the fan; wherein the core stream has a higher pressure than the bypass stream; imparting a first momentum into the air stream proximate the fan in a region between the core and bypass streams and the upstream and downstream splitters to form a fluid barrier, wherein the first momentum of the air stream in the region is higher than a second momentum of the air stream adjacent the fluid barrier.