초록 ▼

A gas turbine engine combustion chamber which has primary, secondary and tertiary combustion zones in flow series has a secondary fuel and air mixing duct and a tertiary fuel and air mixing duct. The secondary mixing duct has a secondary air intake at its upstream end and the tertiary mixing duct ha

A gas turbine engine combustion chamber which has primary, secondary and tertiary combustion zones in flow series has a secondary fuel and air mixing duct and a tertiary fuel and air mixing duct. The secondary mixing duct has a secondary air intake at its upstream end and the tertiary mixing duct has a tertiary air intake at its upstream end. The tertiary air intake is arranged adjacent to the secondary air intake. A combined secondary and tertiary fuel system is provided to supply fuel to the secondary and tertiary mixing ducts. The fuel system comprises a manifold arranged adjacent to the secondary mixing duct but is spaced from the tertiary mixing duct by the secondary mixing duct. The manifold has apertures to direct fuel towards the tertiary air intake across the secondary air intake. Variations in fuel pressure cause the fuel to flow into the secondary air intake or the tertiary air intake.

대표청구항 ▼

A gas turbine engine combustion chamber having an interior defined by at least one peripheral wall, means to define at least one first fuel and air mixing duct, said first fuel and air mixing duct having an upstream and a downstream end, each first fuel and air mixing duct being in fluid flow commun

A gas turbine engine combustion chamber having an interior defined by at least one peripheral wall, means to define at least one first fuel and air mixing duct, said first fuel and air mixing duct having an upstream and a downstream end, each first fuel and air mixing duct being in fluid flow communication at its downstream end with said interior of the combustion chamber, each first fuel and air mixing duct having air intake means at its upstream end to supply air into the first fuel and air mixing duct, means to define at least one second fuel and air mixing duct, said second fuel and air mixing duct having an upstream and a downstream end, each second fuel and air mixing duct being in fluid flow communication at its downstream end with said interior of the combustion chamber, each second fuel and air mixing duct having air intake means at its upstream end to supply air into the second fuel and air mixing duct, fuel injector means to supply fuel to the first and second fuel and air mixing ducts, the fuel injector means comprising a fuel manifold having at least one aperture arranged to direct fuel towards the second air intake means across the first air intake means, means to vary the pressure of the fuel supplied to the fuel injector means such that in operation at pressures greater than a predetermined pressure the fuel is supplied into the at least one second fuel and air mixing duct and at pressures lower than the predetermined pressure the fuel is supplied into the at least one first fuel and air mixing duct.