SECONDARY FUEL FLOW DEMAND FUEL PUMPING SYSTEM

A fuel system (62) for a gas turbine engine (20) includes a main fuel pump (70) generating a main fuel flow (64) into a main fuel passage (114) and a secondary pump (72) generating a secondary fuel flow (88) into a secondary flow passage (118). A first control valve (76) is disposed in a passage (12...

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Bibliographische Detailangaben
Hauptverfasser:	IKEDA, Michael K, COCKS, Peter
Format:	Patent
Sprache:	eng ; fre ; ger
Schlagworte:	AIR INTAKES FOR JET-PROPULSION PLANTS BLASTING COMBUSTION ENGINES CONTROLLING FUEL SUPPLY IN AIR-BREATHING JET-PROPULSION PLANTS GAS-TURBINE PLANTS HEATING HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS LIGHTING MECHANICAL ENGINEERING WEAPONS
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Beschreibung
Zusammenfassung:	A fuel system (62) for a gas turbine engine (20) includes a main fuel pump (70) generating a main fuel flow (64) into a main fuel passage (114) and a secondary pump (72) generating a secondary fuel flow (88) into a secondary flow passage (118). A first control valve (76) is disposed in a passage (120) between the main fuel passage (114) and the secondary flow passage (118). The first control valve (76) selectively directs an excess portion of the main fuel flow (64) to the secondary flow passage (118) to provide at least a portion of the secondary fuel flow (88).