Patent ID: 9562691
Date: 2017-02-07
CPC Classifications: F23R

Claim:
1. An airblast fuel injector for a fuel spray nozzle of a gas turbine engine, the fuel injector having an annular air passage for the passage of a swirling air flow therethrough, the swirling air flow being used by the fuel injector to produce an atomised fuel spray, wherein: the air annular passage contains a swirler for producing the swirling air flow, the swirler comprising a circumferential row of vanes which span inner and outer side walls of the annular air passage; viewed on a longitudinal section through the fuel injector, the annular air passage has a bend downstream of the swirler, the bend changing the direction of the annular air passage; and the vanes are configured to introduce a radial outward component to the air flow exiting the swirler, the radial outward component guiding the air flow around the bend, wherein the vanes are leant to introduce the radial component to the air flow exiting the swirler such that, across each inter-vane passage formed by a suction surface of one vane and a facing pressure surface of a neighbouring vane, with increasing radial distance the lean inclines the suction surface towards the pressure surface.