Geared turbofan engine with power density range
OwnerFrederick M. Schwarz, Daniel Bernard Kupratisinventors
Life of this patent
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Abstract
A gas turbine engine turbine has a high pressure turbine configured to rotate with a high pressure compressor as a high pressure spool in a first direction about a central axis and a low pressure turbine configured to rotate with a low pressure compressor as a low pressure spool in the first direction about the central axis. 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 is connected to the low pressure spool via a speed changing mechanism and rotates in a second direction opposed to the first direction.
Claims20
A gas turbine engine turbine comprising:
- a high pressure turbine configured to rotate with a high pressure compressor as a high pressure spool in a first direction about a central axis;
- a low pressure turbine configured to rotate with a low pressure compressor as a low pressure spool in said first direction about said central axis;
- a power density that is greater than or equal to about 1.5 and less than or equal to about 5.5 lbf/in3;
- and
- a fan connected to the low pressure spool via a speed changing mechanism and will rotate in a second direction opposed to said first direction.
(canceled)
A gas turbine engine turbine comprising:
- a high pressure turbine configured to rotate with a high pressure compressor as a high pressure spool in a first direction about a central axis;
- a low pressure turbine configured to rotate with a low pressure compressor as a low pressure spool in said first direction about said central axis;
- a power density that is greater than or equal to about 1.5 and less than or equal to about 5.5 lbf/in3, said power density is calculated using a value that is sea level take-off, flat-rated static thrust;
- a fan connected to the low pressure spool via a speed changing mechanism and will rotate in a second direction opposed to said first direction;
- and
- guide vanes positioned upstream of a first stage in said low pressure turbine to direct gases downstream of said high pressure turbine as they approach said low pressure turbine, wherein said guide vanes are highly cambered such that said vanes direct products of combustion downstream of the high pressure turbine to be properly directed when initially encountering the first stage of the low pressure turbine.
A gas turbine engine turbine comprising:
- a high pressure turbine configured to rotate with a high pressure compressor as a pressure spool in a first direction about a central axis;
- a low pressure turbine configured to rotate with a low pressure compressor as a low pressure spool in said first direction about said central axis;
- a power density that is greater than or equal to about 1.5 and less than or equal to about 5.5 lbf/in3;
- and
- a fan connected to the low pressure spool via a speed changing mechanism and will rotate in a second direction opposed to said first direction, said fan section delivering a portion of air into a bypass duct and a portion of the air into said low pressure compressor as core flow, and having a bypass ratio greater than 6, and wherein said speed changing mechanism is a gear reduction.
A gas turbine engine turbine comprising:
- a high pressure turbine configured to rotate with a high pressure compressor as a high pressure spool in a first direction about a central axis;
- a low pressure turbine configured to rotate with a low pressure compressor as a low pressure spool in said first direction about said central axis;
- a power density that is greater than or equal to about 4.0;
- and
- a fan connected to the low pressure spool via a speed changing mechanism and will rotate in a second direction opposed to said first direction.
Dependencies are inferred from the claim text.