A method enables a gas turbine engine (10) to be assembled. The method comprises forming at least one substantially elliptically-shaped opening (80) within a flange (72) extending from a fan disk (40), inserting a fastener (120) including a first body portion (122), a second body portion (124), and an anti-rotation stop (126) extending therebetween, at least partially through the at least one flange opening, and coupling the fastener to the flange such that the fastener stop is positioned within the at least one flange opening.

Methods and apparatus for assembling gas turbine engines

A compound cycle engine (10) comprises a compressor and a turbine section (14, 18), and at least one cycle topping device (16) providing an energy input to the turbine section (18). The compressor section (14) compresses the air according to a pressure ratio PRgt. The cycle topping device (16) further compresses the air according to a volumetric compression ratio Rvc, and wherein PRgt x Rvc are selected, according to one aspect of the invention, to provide a cycle which permit a more compact and lighter compound cycle engine to be provided.

Low volumetric compression ratio integrated turbo-compound rotary engine

A compound cycle engine having at least one rotary unit defining an internal combustion engine, a velocity turbine in proximity of each unit, and a turbocharger is discussed. The exhaust port of each rotary unit is in fluid communication with the flowpath of the velocity turbine upstream of its rotor. The rotors of the velocity turbine and of each rotary unit drive a common load. The outlet of the compressor of the turbocharger is in fluid communication with the inlet port of each rotary unit, and the inlet of the pressure turbine of the turbocharger is in fluid communication with the flowpath of the velocity turbine downstream of its rotor. A method of compounding at least one rotary engine is also discussed.

Compound cycle engine

A gas turbine engine having improved output horsepower and a method of achieving it. The engine has, in order, a low pressure compressor, a high pressure compressor, a combustor, a high pressure turbine and a low pressure turbine. The high pressure turbine is drivingly connected to both compressors with a speed reducing gear box therebetween. An intercooler between the compressors reduces the horsepower requirement of the high pressure compressor. Flow from the combustor is sufficiently heated to enable the high pressure turbine to drive both compressors with the output horsepower of the low pressure turbine devoted to the engine load.

Intercooled gas turbine engine

A compound cycle engine (10) comprises a compressor (19) and a turbine section (16 & 20), and at least one cycle topping device (12) cooperating with the turbine section (16 & 20) to provide power The cycle topping device (12) has an output shaft (26) extending at an angle to the turbine shaft (28) Angled gearing (34) is provided for connecting the gas turbine shaft (28) and the cycle topping device (12)

Compact compound engine package

A turbocharged, compounded cycle ducted fan engine system includes a conventional internal combustion engine drivingly connected to a fan enclosed in a duct. The fan provides propulsive thrust by accelerating air through the duct and out an exhaust nozzle. A turbocharger is disposed in the duct and receives a portion of the air compressed by the fan. The turbocharger compressor further pressurizes the air and directs it to the internal combustion engine where it is burned and exits as exhaust gas to drive the turbine. A power turbine also driven by exhaust gas is also drivingly connected through the engine to the fan to provide additional power. The size and weight of the turbocharger are reduced since the compressor's work is partially achieved by the compression effect of the fan. The total propulsive thrust includes the fan generated thrust which bypasses the turbocharger and the thrust of exhaust gases exiting the turbine.

Turbocharged compound cycle ducted fan engine system

A lubrication system for an overriding starter clutch assembly includes an axial input passage through the clutch shaft to radial passages supplying the oil to the inlet of the clutch working unit. A centrifugal pump created by vanes in the clutch housing end face pulls the lubricating oil axially through the clutch.

Ralph Benway

Papers

Turbocharged compound cycle ducted fan engine system

Lubrication system for a starter clutch assembly