Patent ID: 9212819
Filing Date: 2015-12-15
Classification: F23C,F23D,F23R

Abstract:
1. A fuel injection duct for a combustion apparatus, comprising: an inlet opening; an outlet opening, wherein the fuel injection duct conducts only fuel from the inlet opening to the outlet opening; and a duct wall defining an inner surface, wherein the inner surface exhibits a surface structure imparting a swirl to the fuel moving from the inlet opening to the outlet opening, the fuel interacting with the surface structure of the inner surface, wherein the inner surface with the surface structure defines a conduit for the flow of said fuel, wherein the cross-section of the conduit is an open flow area, wherein the surface structure is a groove or a protrusion along the inner surface of the duct wall, imparting a swirl to fuel moving from the inlet opening to the outlet opening.