Auxiliary device for three air flow path gas turbine engine

Patent metadata

Field	Value
Publication number	US-10400709-B2
Application number	US-201414458619-A
Country	US
Kind code	B2
Filing date	Aug 13, 2014
Priority date	Sep 20, 2013
Publication date	Sep 3, 2019
Grant date	Sep 3, 2019

Abstract

A gas turbine engine has a fan rotor including at least one stage, with the at least one stage delivering a portion of air into a low pressure duct, and another portion of air into a compressor. The compressor is driven by a turbine rotor, and the fan rotor is driven by a fan drive turbine. A channel selectively communicates air from the low pressure duct across a boost compressor.

First claim

The invention claimed is:

1. A gas turbine engine comprising:
a fan rotor including at least one stage, with said at least one stage delivering a first portion of air into a low pressure duct, and a second portion of air into a main compressor, said main compressor being driven by a turbine rotor, and said fan rotor being driven by a fan drive turbine;
a channel selectively communicating air from said first portion of air in said low pressure duct across a boost compressor;
air downstream of said boost compressor being delivered into an exhaust gas downstream of said fan drive turbine;
an augmentor section positioned adjacent an exhaust nozzle and air from said boost compressor being directed towards said augmentor section;
wherein a valve selectively blocks or allows flow through said low pressure duct to an outlet, and when the valve is blocking flow, a greater volume of said air is moved into said channel and across the boost compressor;
wherein said boost compressor is driven by said fan drive turbine;
wherein a gear box is positioned between said fan drive turbine and said boost compressor, with said gear box affecting a speed change between said fan drive turbine and said boost compressor;
wherein a connection between said gear box and said boost compressor is a flexible connection;
wherein a clutch selectively connects or disconnects drive from said gear box said boost compressor; and
wherein said clutch is moved to connect drive from said gear box to said boost compressor when said valve blocks flow through said low pressure duct to said outlet, and said clutch disconnects drive from said gear box to said boost compressor when said valve allows flow from said low pressure duct to said outlet.

Assignees

• United Technologies Corp

Inventors

• Roberge Gary D

Classifications

• F02K3/077

  the plant being of the multiple flow type, i.e. having three or more flows · CPC title

• F02K3/075 Primary

  controlling flow ratio between flows · CPC title

• F02C9/18

  by bleeding, bypassing or acting on variable working fluid interconnections between turbines or compressors or their stages {(F02C3/113 takes precedence)} · CPC title

• F02C3/13

  having variable working fluid interconnections between turbines or compressors or stages of different rotors {(controlling flow ratio between different flows of multi-flow jet-propulsion plant, e.g. ducted fan F02K3/075)} · CPC title

• F02K3/10

  by after-burners (F02K3/105 takes precedence) · CPC title