Intergrated environmental control system manifold

Abstract

A compressor intermediate case for a gas turbine engine includes a plurality of intermediate case struts joining the compressor intermediate case to an inner engine structure. Each strut of the plurality of intermediate case struts includes a leading edge. A turning scoop is disposed at the leading edge of each strut of the plurality of intermediate case struts. A plurality of diffusers extends radially outwardly from the compressor intermediate case so that each diffuser of the plurality of diffusers engages with a corresponding turning scoop. A substantially annular structural fire wall extends radially outwardly from the compressor intermediate case. An environmental control system manifold is disposed on the compressor intermediate case. The environmental control system manifold includes an exit port.

What is claimed is: 
     
         1 . An intermediate case for a gas turbine engine compressor, the intermediate case comprising:
 a plurality of intermediate case struts joining the intermediate case to an inner engine structure, each strut of the plurality of intermediate case struts including a leading edge;   a structural fire wall extending radially and outwardly from the intermediate case;   a turning scoop being disposed at the leading edge of each strut of the plurality of intermediate case struts;   a plurality of diffusers extending radially outwardly from the intermediate case, each diffuser of the plurality of diffusers being associated with a corresponding turning scoop; and   an asymmetrical environmental control system manifold being disposed on the intermediate case, the asymmetrical environmental control system manifold being associated with the plurality of diffusers, the asymmetrical environmental control system manifold having a first collection wall and a second collection wall, wherein a downstream extension of the second collection wall tapers such that the second collection wall extends a first distance from the structural fire wall adjacent to an exit port of the asymmetrical environmental control system manifold.   
     
     
         2 . The intermediate case of  claim 1 , wherein the second collection wall tapers along its circumference until it reaches an area oppositely positioned across the compressor intermediate case, and wherein the second collection wall extends a second distance from the structural fire wall that is less than the first distance. 
     
     
         3 . The intermediate case of  claim 2 , wherein the first collection wall tapers such that the first collection wall extends a third distance from the compressor intermediate case adjacent the exit port. 
     
     
         4 . The intermediate case of  claim 3 , wherein the first collection wall tapers along its circumference until it reaches the area oppositely positioned across the compressor intermediate case, and wherein the first collection wall extends a fourth distance from the compressor intermediate case, the fourth distance being less than the third distance. 
     
     
         5 . The intermediate case of  claim 4 , wherein the first collection wall, the second collection wall, the structural fire wall and the compressor intermediate case form a collection chamber of the asymmetrical environmental control system manifold and wherein a configuration of the asymmetrical environmental control system manifold maintains a balanced air pressure within the collection chamber. 
     
     
         6 . The intermediate case of  claim 1 , wherein the first collection wall, the second collection wall, the structural fire wall and the compressor intermediate case form a collection chamber of the asymmetrical environmental control system manifold and wherein a configuration of the asymmetrical environmental control system manifold maintains a balanced air pressure within the collection chamber. 
     
     
         7 . The intermediate case of  claim 1 , wherein, the first collection wall being annular and extending radially outward from the intermediate case and the second collection wall is annular and extends axially from the structural fire wall. 
     
     
         8 . The intermediate case of  claim 5 , further including a non-structural fairing extending radially outwardly from the intermediate case, the non-structural fairing disposed upstream of the annular structural fire wall to define a 2.5 bleed duct therebetween. 
     
     
         9 . The intermediate case of  claim 8 , further including a 2.5 stability bleed valve in operable association with the non-structural fairing and the 2.5 bleed duct, the 2.5 stability bleed valve operably movable between an open and closed position. 
     
     
         10 . The intermediate case of  claim 8 , wherein the 2.5 bleed duct is arranged to the intermediate case forming a first dirt separator. 
     
     
         11 . The intermediate case of  claim 10 , wherein the turning scoop includes an upstream-facing scoop inlet, the scoop inlet being offset substantially radially inwardly from the intermediate case forming a second dirt separator. 
     
     
         12 . An intermediate case for a gas turbine engine compressor, the intermediate case comprising:
 a bleed duct arranged to the intermediate case to form a first dirt separator;   a plurality of intermediate case struts joining the intermediate case to an inner engine structure, each strut of the plurality of intermediate case struts including a leading edge;   a turning scoop being disposed at the leading edge of each strut of the plurality of intermediate case struts, the turning scoop forming a second dirt separator; and   a bleed valve for controlling air flow into the bleed duct.   
     
     
         13 . The intermediate case of  claim 12 , further comprising:
 a structural fire wall extending radially and outwardly from the intermediate case;   a plurality of diffusers extending radially outwardly from the intermediate case, each diffuser of the plurality of diffusers being associated with a corresponding turning scoop; and   an asymmetrical environmental control system manifold being disposed on the intermediate case, the asymmetrical environmental control system manifold being associated with the plurality of diffusers, the asymmetrical environmental control system manifold having a first collection wall and a second collection wall, wherein a downstream extension of the second collection wall tapers such that the second collection wall extends a first distance from the structural fire wall adjacent to an exit port of the asymmetrical environmental control system manifold.   
     
     
         14 . The intermediate case of  claim 13 , wherein the second collection wall tapers along its circumference until it reaches an area oppositely positioned across the compressor intermediate case, and wherein the second collection wall extends a second distance from the structural fire wall that is less than the first distance, and wherein the first collection wall tapers such that the first collection wall extends a third distance from the compressor intermediate case adjacent the exit port. 
     
     
         15 . The intermediate case of  claim 14 , wherein the first collection wall tapers along its circumference until it reaches the area oppositely positioned across the compressor intermediate case, and wherein the first collection wall extends a fourth distance from the compressor intermediate case, the fourth distance being less than the third distance, and wherein the first collection wall, the second collection wall, the structural fire wall and the compressor intermediate case form a collection chamber of the asymmetrical environmental control system manifold and wherein a configuration of the asymmetrical environmental control system manifold maintains a balanced air pressure within the collection chamber. 
     
     
         16 . The intermediate case of  claim 13 , wherein the first collection wall, the second collection wall, the structural fire wall and the compressor intermediate case form a collection chamber of the asymmetrical environmental control system manifold and wherein a configuration of the asymmetrical environmental control system manifold maintains a balanced air pressure within the collection chamber. 
     
     
         17 . The intermediate case of  claim 13 , wherein, the first collection wall being annular and extending radially outward from the intermediate case and the second collection wall is annular and extends axially from the structural fire wall. 
     
     
         18 . A method of providing cleaner environmental control system bleed air, which exits a gas turbine engine, so that there is minimal disruption to a core air flow, the method comprising:
 forming a first dirt separator via a bleed duct arranged to an intermediate case;   joining a plurality of intermediate case struts to an inner engine structure, each strut of the plurality of intermediate case struts including a leading edge;   forming a second dirt separator via a turning scoop disposed at the leading edge of each strut of the plurality of intermediate case struts; and   controlling air flow into the bleed duct via a bleed valve.   
     
     
         19 . The method  claim 18 , wherein the intermediate case further comprises:
 a structural fire wall extending radially and outwardly from the intermediate case;   a plurality of diffusers extending radially outwardly from the intermediate case, each diffuser of the plurality of diffusers being associated with a corresponding turning scoop; and   an asymmetrical environmental control system manifold being disposed on the intermediate case, the asymmetrical environmental control system manifold being associated with the plurality of diffusers, the asymmetrical environmental control system manifold having a first collection wall and a second collection wall, wherein a downstream extension of the second collection wall tapers such that the second collection wall extends a first distance from the structural fire wall adjacent to an exit port of the asymmetrical environmental control system manifold.   
     
     
         20 . The method of  claim 19 , wherein the second collection wall tapers along its circumference until it reaches an area oppositely positioned across the compressor intermediate case, and wherein the second collection wall extends a second distance from the structural fire wall that is less than the first distance, and wherein the first collection wall tapers such that the first collection wall extends a third distance from the compressor intermediate case adjacent the exit port.