Patent ID: 7861529
Filing Date: 2011-01-04
Classification: F23R,Y02T

Abstract:
1. A turbomachine combustion chamber fuel supply assembly comprising: a dual-flow fuel injector which injects a primary flow of fuel delivered by a primary fuel supply circuit and a secondary flow of fuel delivered by a secondary fuel supply circuit, the primary flow of fuel forming a cone of fuel formed by the primary and secondary flows of fuel; and an injection device which injects the fuel from the injector, the injection device including a symmetry of revolution about an axis and comprising, positioned from an upstream position to a downstream position in a direction in which the flow of fuel flows, a sliding bushing at the center of which the injector is positioned, radial swirl vanes connected by their downstream end to a bowl, the radial swirl vanes comprising a Venturi equipped with an interior wall that includes an evolving profile with a convergent upstream part connected to a divergent downstream part by a transition region, the Venturi having a minimum inside diameter at the transition region, wherein the Venturi has a length, a shape and an axial position such that the cone of fuel from the primary circuit strikes the Venturi, wherein the cone of fuel includes, downstream of the Venturi, a vertex half-angle β ranging between 30 and 40 degrees with respect to the axis, wherein the cone of fuel includes a central first part and a peripheral second part, the central first part forming a central cone with a vertex half-angle α wherein the cone of fuel strikes the interior wall of the Venturi over a surface extending from a point A wherein the central cone and the peripheral cone correspond to different types of injection.