US 11,808,178 B2
Tangential onboard injector inlet extender
Robin Prenter, Avon, CT (US); Ricardo Trindade, Mansfield, CT (US); and Ryan Lundgreen, Granby, CT (US)
Assigned to RTX CORPORATION, Farmington, CT (US)
Filed by RTX Corporation, Farmington, CT (US)
Filed on Aug. 5, 2019, as Appl. No. 16/531,430.
Prior Publication US 2021/0054753 A1, Feb. 25, 2021
Int. Cl. F01D 9/06 (2006.01); F01D 5/08 (2006.01); F02C 7/18 (2006.01); F23R 3/02 (2006.01)
CPC F01D 9/065 (2013.01) [F01D 5/081 (2013.01); F02C 7/18 (2013.01); F23R 3/02 (2013.01); F05D 2240/12 (2013.01)] 18 Claims
OG exemplary drawing
 
1. A diffuser case for a gas turbine engine, comprising:
a pre-diffuser;
the diffuser case defining a dump region downstream of the pre-diffuser, an inner plenum, and an outer plenum, the pre-diffuser being fluidly connected to the inner plenum and the outer plenum through the dump region;
a tangential onboard injector module fluidly connected to the inner plenum through an inlet orifice located in the diffuser case proximate an aft end of the inner plenum;
an inlet extender initiating at the inlet orifice of the tangential onboard injector module, the inlet extender extending through the inner plenum, and terminates at a distal end proximate the pre-diffuser, the distal end being a free end; and
wherein the distal end of the inlet extender is located in the dump region between an aft end of the pre-diffuser and a forward end of a forward dome of a combustor of the gas turbine engine, the inlet extender fluidly separates the inner plenum into a first inner plenum and a second inner plenum, each having an inlet opening proximate to the distal end of the inlet extender and the second inner plenum being radially outward of the first inner plenum, wherein the inlet orifice is fluidly connected to the first inner plenum.