US2012070271A1PendingUtilityA1

Gas turbine engine with bleed duct for minimum reduction of bleed flow and minimum rejection of hail during hail ingestion events

45
Individually held — no corporate assignee on recordPriority: Sep 21, 2010Filed: Sep 21, 2010Published: Mar 22, 2012
Est. expirySep 21, 2030(~4.2 yrs left)· nominal 20-yr term from priority
Inventors:Justin R. UrbanAnthony R. Bifulco
F02C 7/047F04D 27/023F02C 7/05F05D 2260/607F05D 2260/606F02C 6/08F02K 3/06F04D 29/545F01D 17/105F02C 6/18F02C 7/052Y02T50/60Y10T29/49231
45
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Claims

Abstract

A gas turbine engine includes a bleed structure which includes a forward wall and a rear structural wall to define a deposit space downstream of the bleed structure for a hail event of a predetermined duration.

Claims

exact text as granted — not AI-modified
What is claimed: 
     
         1 . A gas turbine engine comprising:
 a bleed structure which includes a forward wall; and   a rear structural wall to define a deposit space downstream of said bleed structure.   
     
     
         2 . The gas turbine engine as recited in  claim 1 , further comprising a bleed duct aft lip located aft of said forward wall, said bleed duct aft lip extends in a radial direction less than said forward wall. 
     
     
         3 . The gas turbine engine as recited in  claim 1 , wherein said rear structural wall forms a portion of a core case section. 
     
     
         4 . The gas turbine engine as recited in  claim 1 , further comprising a circumferentially intermittent aft wall aft of said forward wall to define said bleed duct. 
     
     
         5 . The gas turbine engine as recited in  claim 1 , wherein said rear structural wall backstops the bleed structure. 
     
     
         6 . The gas turbine engine as recited in  claim 1 , further comprising a split duct particle separation structure aft of said forward wall which defines a bleed airflow path and a particle path aft of said bleed airflow path. 
     
     
         7 . The gas turbine engine as recited in  claim 6 , wherein said split duct particle separation structure includes a split wall and a particle separation wall. 
     
     
         8 . The gas turbine engine as recited in  claim 7 , wherein said split wall is radially outboard of said particle separation wall. 
     
     
         9 . The gas turbine engine as recited in  claim 1 , wherein said rear structural wall at least partially forms the bleed duct aft wall. 
     
     
         10 . The gas turbine engine as recited in  claim 9 , wherein said rear structural wall separates a first engine section from a second engine section. 
     
     
         11 . The gas turbine engine as recited in  claim 9 , wherein said rear structural wall is directly adjacent to a high pressure compressor case. 
     
     
         12 . The gas turbine engine as recited in  claim 1 , wherein said bleed structure defines a station 2.5 bleed duct. 
     
     
         13 . The gas turbine engine as recited in  claim 1 , wherein said deposit space is sized for a hail event of a predetermined duration. 
     
     
         14 . A gas turbine engine comprising:
 a bleed structure which includes a forward wall and an aft wall; and   a fluid plenum at least partially formed by said aft wall to receive a heated fluid.   
     
     
         15 . The gas turbine engine as recited in  claim 14 , wherein said bleed structure defines a station 2.5 bleed duct. 
     
     
         16 . The gas turbine engine as recited in  claim 14 , wherein said heated fluid is oil. 
     
     
         17 . The gas turbine engine as recited in  claim 14 , wherein said heated fluid is air. 
     
     
         18 . A method to minimize the formation of hail in a bleed passage of a gas turbine engine comprising:
 defining a deposit space downstream of a bleed structure for a hail event of a predetermined duration.   
     
     
         19 . A method as recited in  claim 18 , defining an intermittent aft wall upstream of the deposit space. 
     
     
         20 . A method as recited in  claim 18 , locating a rear structural wall to at least partially form a bleed duct aft wall.

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