Patent ID: 11920795
Assignee: DOOSAN ENERBILITY CO., LTD.
Field: Engines, pumps, turbines (Mechanical engineering)
Classification: CPC F | IPC F

Claim 0:
1. A fuel injection device for a combustor comprising:
a flow guide comprising a rod-shaped body and a plurality of protrusions protruding outwardly from the rod-shaped body;
a plurality of guide channels connected to a pilot fuel passage through which fuel is supplied, each guide channel being formed between two adjacent protrusions of the plurality of protrusions, outward ends of the two adjacent protrusions being circumferentially spaced apart from each other;
an injection chamber connected to the plurality of guide channels, the fuel being merged in the injection chamber; and
an injection hole formed at a tip of the injection chamber to inject the fuel,
wherein the injection chamber comprises a decompression space to drop a pressure therein,
wherein each guide channel has an outlet formed at a protrusion tip, each protrusion tip of each protrusion protrudes forward gradually outwards, such that the protrusion tip and the outlet have a curved structure,
wherein the protrusion tip and the outlet connected with a groove of the rod-shaped body form the decompression space,
wherein the protrusion comprises a tail protrusion protruding further rearward than a rearward end of the rod-shaped body,
wherein the tail protrusion has a shape of a concave groove formed from a rearward end of the rod-shaped body to an outward end of the tail protrusion,
wherein forward and rear directions are viewed in an upstream direction with respect to a flow of the fuel through the plurality of guide channels along a longitudinal direction of the flow guide.