REVERSED-FLOW CORE FOR A TURBOFAN WITH A FAN DRIVE GEAR SYSTEM
First Claim
Patent Images
1. A gas turbine engine comprising:
- a fan drive gear system;
a low spool connected to the fan drive gear system, the low spool comprising;
a rearward-flow low pressure compressor disposed aft of the fan drive gear system; and
a forward-flow low pressure turbine disposed aft of the low pressure compressor; and
a high spool disposed aft of the low spool, the high spool comprising;
a forward-flow high pressure turbine disposed aft of the low pressure turbine;
a combustor disposed aft of the high pressure turbine; and
a forward-flow high pressure compressor disposed aft of the combustor.
4 Assignments
0 Petitions
Accused Products
Abstract
A gas turbine engine comprises a fan drive gear system, a low spool connected to the fan drive gear system, and a high spool disposed aft of the low spool. The low spool comprises a rearward-flow low pressure compressor disposed aft of the fan drive gear system, and a forward-flow low pressure turbine disposed aft of the low pressure compressor. The high spool comprises a forward-flow high pressure turbine disposed aft of the low pressure turbine, a combustor disposed aft of the high pressure turbine, and a forward-flow high pressure compressor disposed aft of the combustor.
164 Citations
20 Claims
-
1. A gas turbine engine comprising:
-
a fan drive gear system; a low spool connected to the fan drive gear system, the low spool comprising; a rearward-flow low pressure compressor disposed aft of the fan drive gear system; and a forward-flow low pressure turbine disposed aft of the low pressure compressor; and a high spool disposed aft of the low spool, the high spool comprising; a forward-flow high pressure turbine disposed aft of the low pressure turbine; a combustor disposed aft of the high pressure turbine; and a forward-flow high pressure compressor disposed aft of the combustor. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13)
-
-
14. A turbofan engine comprising:
-
a turbofan propulsor for producing downstream flowing bypass gas and core gas; a cross-flow low pressure spool comprising; a low pressure compressor for receiving downstream flowing core gas from the turbofan propulsor; and a low pressure turbine having upstream flow; a gear reduction system for coupling the turbofan propulsor to an input rotation; an air duct for turning downstream flowing core gas from the low pressure compressor radially inward for upstream flow; a reversed-flow core with upstream flow configured to receive upstream flowing core gas from the air duct and to deliver upstream flowing core gas to the low pressure turbine; and an exhaust pipe for turning upstream flow of core gas from the low pressure turbine radially outward for discharge into the downstream flow of bypass gas. - View Dependent Claims (15, 16, 17, 18)
-
-
19. A method for operating a turbofan engine, the method comprising:
-
generating an axially downstream flow of fan air with a fan drive gear system; splitting the fan air into a first portion directed downstream into an exhaust duct, and a second portion directed downstream into a low pressure compressor; redirecting compressed air from the low pressure compressor to a reverse flow duct to produce an axially upstream flow of compressed air; directing the upstream flow of compressed air sequentially through a high pressure compressor, a combustor, a high pressure turbine and a low pressure turbine to produce exhaust gas; and venting the exhaust gas into the exhaust duct to join the first portion of the fan air. - View Dependent Claims (20)
-
Specification