Patent ID: 11859821
Assignee: COLLINS ENGINE NOZZLES, INC.
Field: Engines, pumps, turbines (Mechanical engineering)
Classification: CPC F | IPC F

Claim 0:
1. An injection system comprising:
an inner nozzle body defining a first air path along a longitudinal axis, wherein the first air path defines a converging-diverging section between an upstream portion of the first air path and an outlet orifice of the first air path, wherein a main orifice is defined at a narrowest portion of the converging-diverging section;
a fuel circuit wall outboard of the inner nozzle body, wherein a fuel path is defined between the fuel circuit wall and the inner nozzle body; and
an outer nozzle body outboard of the fuel circuit wall with a second air path defined through the outer nozzle body for communication of air from the outer nozzle body into the first air path, wherein the second air path meets the first air path at a second orifice in the first air path downstream of the main orifice of the inner nozzle body,
wherein the second air path passes from a first section through the outer nozzle body, to a second section that passes between the outer nozzle body and the fuel circuit wall, to a terminal section of the second air path and into the first air path at the second orifice,
wherein the first air path enters the converging-diverging section along an upstream portion of the longitudinal axis, and wherein the first section of the second air path approaches the second orifice from a direction along a downstream portion of the longitudinal axis, opposite the upstream portion, wherein the outer nozzle body defines a combustion chamber of a torch ignitor downstream of the outlet orifice for combustion of fuel and air issued into the combustion chamber from the first and second air paths and from the fuel path.