Fuel Schedule for Robust Gas Turbine Engine Transition Between Steady States

摘要

A fuel injection system for a gas turbine engine can be used to ensure successful transition in all conditions, while avoiding the possibility of steady state, or increasing power mode, operations with an insufficiently filled secondary fuel line. This may be accomplished by altering a pressure in a secondary fuel line. The present disclosure allows for the elimination of individual fuel injector valves, which may reduce the total complexity and number of parts of the fuel injection system.

主权项

1. A fuel injection system for a gas turbine engine, comprising:
a primary fuel line; a secondary fuel line; a fuel pump; a fuel supply; a control system adapted to operate in a first fuel delivery mode including a first delta pressure condition between the primary fuel line and the secondary fuel line, the control system adapted to further operate in a second fuel delivery mode including a second delta pressure condition between the primary fuel line and the secondary fuel line; and a fuel schedule operated by the control system and employing the first fuel delivery mode during a transition between steady states and subsequently employing the second fuel delivery mode before the gas turbine engine enters a steady state.