GEARED TURBOFAN ENGINE WITH POWER DENSITY RANGE

摘要

A gas turbine engine (120) has a high pressure turbine (130) configured to rotate with a high pressure compressor (126) as a high pressure spool (132) in a first direction about a central axis (C) and a low pressure turbine (134) configured to rotate with a low pressure compressor (124) as a low pressure spool (136) in the first direction about the central axis (C). A power density is greater than or equal to about 1.5 and less than or equal to about 5.5 lbf/cubic inches. A fan (122) is connected to the low pressure spool (136) via a speed changing mechanism (48) and rotates in a second direction opposed to the first direction.