US 12,404,806 B2
High pressure turbine dirt blocker
Michael G. McCaffrey, Windsor, CT (US); and Christopher King, Terryville, CT (US)
Assigned to RTX Corporation, Farmington, CT (US)
Filed by Raytheon Technologies Corporation, Farmington, CT (US)
Filed on Dec. 15, 2021, as Appl. No. 17/551,685.
Prior Publication US 2023/0184139 A1, Jun. 15, 2023
Int. Cl. F02C 7/052 (2006.01); B01D 45/08 (2006.01); F01D 25/32 (2006.01)
CPC F02C 7/052 (2013.01) [B01D 45/08 (2013.01); F01D 25/32 (2013.01); F05D 2260/607 (2013.01)] 8 Claims
OG exemplary drawing
 
1. A dirt blocker comprising:
a support structure disposed within a gas turbine engine, the gas turbine engine having a central longitudinal axis and comprising a high pressure turbine stage including a high pressure turbine stage vane axially forward of a high pressure turbine stage blade, the support structure disposed radially outward with respect to the central longitudinal axis from the high pressure turbine stage vane, axially aligned with the high pressure turbine stage vane and axially forward of the high pressure turbine stage blade, said support structure defining and dividing an upstream control volume and a downstream control volume, said downstream control volume being opposite said upstream control volume relative to said support structure, wherein upstream and downstream are with respect to cooling air flow direction,
a flow passage formed radially through an axially extending portion of said support structure, said flow passage formed between and configured to fluidly couple said upstream control volume with said downstream control volume, all of said upstream control volume being upstream of the flow passage, all of the downstream control volume being downstream of the flow passage;
a radial contact wall extending from said support structure within said upstream control volume upstream of the flow passage, said radial contact wall configured to intercept debris entrained within cooling air within said upstream control volume upstream of the flow passage; and
a stagnation zone within said upstream control volume fluidly coupled with said flow passage, the stagnation zone being upstream of the flow passage and axially aft of the flow passage, said stagnation zone configured to reduce momentum of said debris upstream of the flow passage.