초록 ▼

A multi-stream fuel injector for a gas turbine engine comprises a plurality of concentric member which define a plurality of flow passages carrying HP compressor air or fuel/air mixture. One of the members is formed with a wide-angle, frusto-conical flared lip to propagate a wide-angle fuel/air mixt

A multi-stream fuel injector for a gas turbine engine comprises a plurality of concentric member which define a plurality of flow passages carrying HP compressor air or fuel/air mixture. One of the members is formed with a wide-angle, frusto-conical flared lip to propagate a wide-angle fuel/air mixture cone in the combustion region. The lip is of such a cross-sectional configuration that air flowing over the lip surface remains attached to the surface and flows in a non-turbulent manner, initially in a radially inward direction, and subsequently in a radially outward direction. The lip ensures that undesirable regions of recirculation are avoided around the fuel injector.

대표청구항 ▼

[ We claim:] [1.] A gas turbine engine fuel injector comprising a plurality of concentric members defining a plurality of concentric annular passages, including a fuel passage and radially outwardly thereof at least one further passage for the flow therethrough of air, an inwardly directed annular l

[ We claim:] [1.] A gas turbine engine fuel injector comprising a plurality of concentric members defining a plurality of concentric annular passages, including a fuel passage and radially outwardly thereof at least one further passage for the flow therethrough of air, an inwardly directed annular lip portion of a first concentric member defining the downstream end of said further passage, said annular lip portion having a radially inwardly directed curved first surface, a radially outwardly directed curved second surface, said first surface smoothly adjoining said second surface, and a radially outwardly extending curved third surface on the first concentric member, said first and second surfaces defining a cross-sectional shape such that in said further passage, air flowing over said inwardly directed annular lip portion remains attached to the surface of the lip so as to flow in a substantially non-turbulent manner initially in a generally radially inward direction and subsequently in a generally radially outward direction, wherein the second surface intersects the third surface to define an outwardly flared lip.